2024 Dermnetnz - Keratosis pilaris is a very common, dry skin condition caused by keratin accumulation in the hair follicles. The Latin term keratosis means ‘ scaly skin’, and pilaris means ‘hair’. Keratosis pilaris usually starts in childhood but becomes more obvious during the teenage years and adulthood. It is harmless and is not infectious.

 
Candidal intertrigo classically presents as erythematous and macerated plaques with peripheral scaling. There are often associated superficial satellite papules or pustules. Affected areas may include: Skin folds below the breasts or …. Dermnetnz

Guttate psoriasis is a clinical diagnosis, aided by dermoscopy, which can be confirmed on skin biopsy. Examination and investigations should include a search for streptococcal infection. Tests may include: Swabs for bacteriology. Blood tests — Anti-streptolysin O titre (ASOT), anti-DNase B titre.Tinea corporis is spread by the shedding of fungal spores from infected skin. Transmission is facilitated by a warm, moist environment and the sharing of fomites including bedding, towels, and clothing. Dermatophyte infection elsewhere on the skin, such as tinea pedis, can also be transferred. The incubation period is 1–3 …A solar lentigo is a flat, well- circumscribed patch. It can be round, oval or irregular in shape. Colour varies from skin-coloured, tan to dark brown or black, and size varies from a few millimetres to several centimetres in diameter. They can be slightly scaly. Solar lentigines are found as groups of similar lesions on sun-exposed sites ...Mohs micrographic surgery, or Mohs surgery, is a precise surgical technique in which the complete excision of skin cancer is checked by microscopic margin control. It offers the highest cure rates while maximizing preservation of healthy tissue. The principles behind it were developed by Dr Frederic Mohs in the 1930s.Salicylic acid belongs to a group of medicines known as keratolytics. It is used in the treatment of scaly skin diseases where the skin has become thickened, scaly and flaky. Topical preparations of salicylic acid, either alone or in combination with other medicines, can be used to treat the following common scaly skin conditions: Viral warts. Fungal infection of the nail, also known as onychomycosis, compromises over 50% of all nail disease with an estimated prevalence of 5.5%. They can affect the toenails, fingernails, or both. Fungal nail infections are also known as tinea unguium in the case of dermatophyte infections. It affects the superficial layers of the epidermis and is typically caused by Staphylococcus aureus and Streptococcus pyogenes (Group A beta – haemolytic streptococci (GABHS)). It can be classified into non- bullous (also known as ‘school sores’) and bullous impetigo. Ecthyma is a deep form of impetigo causing deeper erosions of the skin ... Photodynamic therapy (PDT) is a treatment used mainly for superficial types of skin cancer. PDT is effective in treating actinic keratoses, in situ squamous cell carcinoma (Bowen disease), and superficial basal cell carcinomas. It may also be used for treatment of small, thin, low-risk nodular basal cell carcinomas outside of the head and neck ... Actinic keratoses are very common on sites repeatedly exposed to the sun, especially the backs of the hands and the face, most often affecting the ears, nose, cheeks, upper lip, vermilion of the lower lip, temples, forehead, and balding scalp. In severely chronically sun-damaged individuals, they may also be found on the upper trunk, upper and ...Chronic urticaria can affect children and adults. Chronic inducible urticaria is more common than chronic spontaneous urticaria. Adults with chronic urticaria have a significantly higher prevalence of atopicdermatitis, asthma, and allergic rhinitis than a control population. In children, the prevalence of atopy is similar in those with …Intertrigo is due to genetic and environmental factors. Flexural skin has a relatively high surface temperature. Moisture from insensible water loss and sweating cannot evaporate due to occlusion. Friction from the movement of adjacent skin results in chafing. Intertrigo occurs more easily in environments that are hot and humid.DermNet images. View pictures of acral lentiginous melanoma in the gallery below. This rare subtype of melanoma can appear on the palms, soles, or under the nails. It can arise in normal-appearing skin, or more rarely it can develop within an …What is blue toe syndrome?. Blue toe syndrome, also known as occlusive vasculopathy, is a form of acute digital ischaemia in which one or more toes become a blue or violet colour. There may also be scattered areas of petechiae or cyanosis of the soles of the feet.. Blue toe syndrome is associated with small vessel occlusion and can occur without obvious …Irritant contact dermatitis develops when chemical or physical agents damage the skin surface faster than the skin can repair. Irritants remove oils and natural moisturising factor from the outer layer of the skin, allowing chemical irritants to penetrate the skin barrier and trigger inflammation. Factors influencing the development and ...Dermatitis overview. Created 2008. Learning objectives. Describe acute and chronic dermatitis; Outline general management of dermatitis; Introduction. Dermatitis and eczema are words that are often used interchangeably to describe a variety of distinct skin conditions in which there is epidermal and dermal inflammation and nearly always intense …Periorificial dermatitis is a common facial skin problem characterised by groups of itchy or tender small red papules. The area around the eyes, nose, and mouth are most commonly affected, however papules may also be found on the genitals. The characteristics of facial periorificial dermatitis are as follows. Keratoacanthoma (KA) is a common, rapidly growing, locally destructive skin tumour . KAs may regress spontaneously with scarring, but clinically they may be indistinguishable from well- differentiated squamous cell carcinoma (SCC) and the clinical course may be unpredictable. Thus, many clinicians and pathologists prefer the term SCC, KA-type ... Definition. Dermatology is the medical discipline that is concerned with the diagnosis and treatment of diseases of the skin, hair , and nails in both children and adults. Specialists in dermatology are called dermatologists. The New Zealand Dermatological Society’s definition is comprehensive: Exanthems during childhood are very common and are usually due to specific viral infections: Chickenpox (varicella) Measles (morbillivirus) Rubella (rubella virus) Roseola (herpes virus 6B) Erythema infectiosum (parvovirus B19). Viral exanthems also include: Acute human immunodeficiency virus infection syndrome. Smallpox.Pityriasis rosea is a self-limiting rash, which resolves in about 6–10 weeks. It is characterised by a large circular or oval "herald patch ", usually found on the chest, abdomen, or back. The herald patch …dermnetnz .org. DermNet is a worldwide clinical resource website about dermatology and skin conditions. [1] Its co-founder and former editor-in-chief is dermatologist and Adjunct Associate Professor Amanda Oakley. [2] The website was launched in 1996 under the umbrella of the New Zealand Dermatological Society, and as of 2017, …Intense pulsed light (IPL) or flashlamp therapy is a non- invasive and non- ablative treatment that uses high-intensity pulses of visible light to improve the appearance of the following skin problems: Vascular lesions including spider telangiectasis, port wine stains, broken facial veins, rosy cheeks, rosacea and red thread veins of the legs.Dermatitis overview. Created 2008. Learning objectives. Describe acute and chronic dermatitis; Outline general management of dermatitis; Introduction. Dermatitis and eczema are words that are often used interchangeably to describe a variety of distinct skin conditions in which there is epidermal and dermal inflammation and nearly …Many writers are based in New Zealand, but others have contributed from UK, USA, Canada, Australia, Mexico, Indonesia, Sri Lanka and elsewhere. Visit our website at …Contact dermatitis (also called contact eczema) refers to a group of skin disorders in which the skin reaction is due to direct contact with the causative agent. The term dermatitis implies that the outside layers of skin are affected. It can be acute (a single episode) or chronic ( persistent ). Dermatitis is nearly always itchy.Learn about atopic dermatitis, the most common inflammatory skin disease worldwide, affecting people with an atopic tendency. Find out the causes, clinical features, complications, diagnosis, and treatment of this condition.Dermoscopy quiz (2 of 3) Dermoscopy quiz (3 of 3) Different causes of purpura – 10 cases. Eczema – 14 cases. Fungal infections – 12 cases. Hair loss – 14 cases. Irritant contact dermatitis – 12 cases. Irritating skin problems affecting the axilla – 10 cases. Leg rashes and unwell – 10 cases.Atopic hand dermatitis occurs in at least 50–60% of people with active atopic dermatitis, including children. The prevalence of hand involvement increases with age, with hand dermatitis detected in 30–40% of atopic babies and toddlers (age 0–2 years), 55% of atopic children aged 3–12 years, and 65% in those aged over 12 years.Many writers are based in New Zealand, but others have contributed from UK, USA, Canada, Australia, Mexico, Indonesia, Sri Lanka and elsewhere. Visit our website at …A Marjolin ulcer is the rare development of cutaneous squamous cell carcinoma (SCC) in the site of a scar or ulcer. It most commonly forms at the site of an old thermal burn scar. However, Marjolin ulcers may also form from osteomyelitic lesions and, rarely, venous ulcers, pressure sores , surgical scars, animal bites, and vaccination scars [1].Salicylic acid belongs to a group of medicines known as keratolytics. It is used in the treatment of scaly skin diseases where the skin has become thickened, scaly and flaky. Topical preparations of salicylic acid, either alone or in combination with other medicines, can be used to treat the following common scaly skin conditions: Viral warts.Berdazimer, a first-in-class gel, allows self-application along with the stable release of NO to the affected skin at the time and site of application, minimising systemic exposure. This is significant as a potential alternative to current molluscum contagiosum treatments including in-clinic curettage, cryotherapy, laser ablation, or chemical ...Dermatology resources for medical students. Welcome to DermNet’s medical student resource centre. This centre has been designed to help increase your confidence and …A list of the most commonly used key terms and phrases in dermatology. A solar lentigo is a flat, well- circumscribed patch. It can be round, oval or irregular in shape. Colour varies from skin-coloured, tan to dark brown or black, and size varies from a few millimetres to several centimetres in diameter. They can be slightly scaly. Solar lentigines are found as groups of similar lesions on sun-exposed sites ... DermNet NZ revision January 2021. Table of contents What is leprosy? Leprosy, also called Hansen disease, is a chronic bacterial infection primarily affecting the skin and peripheral nerves usually caused by Mycobacterium leprae. The form the disease takes depends on the person’s immune response to the infection. ... Definition. Dermatology is the medical discipline that is concerned with the diagnosis and treatment of diseases of the skin, hair , and nails in both children and adults. Specialists in dermatology are called dermatologists. The New Zealand Dermatological Society’s definition is comprehensive: Patches are round, oval or irregular in shape. Pityriasis alba may have well- demarcated or, more usually, poorly defined edges. Itch is minimal or absent. Hypopigmentation is more noticeable in summer. Dryness and scaling is more noticeable in winter when environmental humidity tends to be lower. Typically, a patch of pityriasis alba evolves ... The solar (actinic) keratosis is the most common precursor lesion for squamous cell carcinoma. Histologically, atypical keratinocytes are found in the basal layer of the epidermis. Actinic keratoses are found on sun-exposed sites, mainly face, ears and hands. They are often multiple and have a hard scaly surface without induration (which would ... Actinic keratoses are very common on sites repeatedly exposed to the sun, especially the backs of the hands and the face, most often affecting the ears, nose, cheeks, upper lip, vermilion of the lower lip, temples, forehead, and balding scalp. In severely chronically sun-damaged individuals, they may also be found on the upper trunk, upper and ...Confluent and reticulated papillomatosis is an uncommon skin condition affecting the trunk, neck and axillae. It is characterised by asymptomatic, hyperpigmented papules and plaques that have a peripheral, net-like …DermNet images. View pictures of acral lentiginous melanoma in the gallery below. This rare subtype of melanoma can appear on the palms, soles, or under the nails. It can arise in normal-appearing skin, or more rarely it can develop within an …Lipoedema almost exclusively affects women. Due to oestrogen receptors in the white adipose tissue, oestrogen is considered to be a major factor. Similar changes to lipoedema can occur in men with hormone disorders such as testosterone deficiency in association with cirrhosis of the liver and renal failure, testicular cancer, and hypogonadism .Dermatology resources for medical students. Welcome to DermNet’s medical student resource centre. This centre has been designed to help increase your confidence and … The features in common for benign skin lesions include: Symmetry in shape, colour and structure. Stable or slowly evolving. Absence of spontaneous bleeding (bleeding or ulceration may be due to recent injury). Benign lesions can be classified by their cellular origin: melanocytic, keratinocytic, vascular, fibrous, fat, and so on, Plant dermatitis is an inflammation of the skin caused by topical contact with a plant or plant constituent. Phytodermatitis is the formal medical name for plant dermatitis, and it may be an irritant contact dermatitis, allergic contact dermatitis, or phytophotodermatitis. Contact urticaria and mechanical irritation can also be due …Chondrodermatitis nodularis is a solitary, firm, and oval-shaped nodule, 4–6 mm in diameter, with central crust and surrounding erythema. In men, the most common site for CNH is the helix, while in women it is more often found on the antihelix. It is typically unilateral, located on the sleeping side, but can be bilateral. Basal cell carcinoma (BCC) is a common, locally invasive, keratinocyte cancer (also known as nonmelanoma cancer). It is the most common form of skin cancer. BCC is also known as rodent ulcer and basalioma. Patients with BCC often develop multiple primary tumours over time. It affects the superficial layers of the epidermis and is typically caused by Staphylococcus aureus and Streptococcus pyogenes (Group A beta – haemolytic streptococci (GABHS)). It can be classified into non- bullous (also known as ‘school sores’) and bullous impetigo. Ecthyma is a deep form of impetigo causing deeper erosions of the skin ...A topical steroid is an anti- inflammatory preparation used to control eczema / dermatitis and many other skin conditions. Topical steroids are available in creams, ointments, solutions and other vehicles. Topical steroids are also called topical corticosteroids, glucocorticosteroids, and cortisone. Pruritus is the medical term for itch. Itch is an unpleasant sensation on the skin that provokes the desire to rub or scratch the area to obtain relief. Itch can cause discomfort and frustration; in severe cases it can lead to disturbed sleep, anxiety and depression. Constant scratching to obtain relief can damage the skin ( excoriation ... Contact dermatitis (also called contact eczema) refers to a group of skin disorders in which the skin reaction is due to direct contact with the causative agent. The term dermatitis implies that the outside layers of skin are affected. It can be acute (a single episode) or chronic ( persistent ). Dermatitis is nearly always itchy.A melanocytic naevus (American spelling ‘ nevus ’), or mole, is a common benign skin lesion due to a local proliferation of pigment cells ( melanocytes ). It is sometimes called a naevocytic naevus or just 'naevus' (but note that there are other types of naevi ). A brown or black melanocytic naevus contains the pigment melanin, so may also ...Dermatopathology is a subspecialty of pathology. Pathology is the study of diseases. It includes the study of the causes, course and progression and the complications that arise from the disease. Anatomic pathology, or histopathology, refers to the study of the structural and compositional changes that occur in organs and tissues as a result of ... Keratoacanthoma (KA) is a common, rapidly growing, locally destructive skin tumour . KAs may regress spontaneously with scarring, but clinically they may be indistinguishable from well- differentiated squamous cell carcinoma (SCC) and the clinical course may be unpredictable. Thus, many clinicians and pathologists prefer the term SCC, KA-type ... Pityriasis versicolor affects the trunk, neck, and/or arms, and is uncommon on other parts of the body. The patches may be coppery brown, paler than surrounding skin, or pink. Pale patches may be more common in darker skin; this appearance is known as pityriasis versicolor alba. Sometimes the patches start scaly and brown, and …It affects the superficial layers of the epidermis and is typically caused by Staphylococcus aureus and Streptococcus pyogenes (Group A beta – haemolytic streptococci (GABHS)). It can be classified into non- bullous (also known as ‘school sores’) and bullous impetigo. Ecthyma is a deep form of impetigo causing deeper erosions of the skin ...Pigmentation disorders are often more troublesome in skin of colour. The melanocytes ( pigment cells) are located at the base of the epidermis and produce the protein melanin. Melanin is carried by keratinocytes to the skin surface. The melanocytes of dark-skinned people produce more melanin than those of people with light skin.Learn about pityriasis rosea, a self-limiting rash that causes a large circular or oval patch on the chest, abdomen, or back. Find out the causes, symptoms, diagnosis, treatment, and …It may cause discomfort or bleeding when passing bowel motions, and aggravate any tendency to constipation, particularly in children. Lichen sclerosus causes adhesions and scarring. The clitoris may be buried. The labia minora resorb/shrink. The entrance to the vagina tightens (introital stenosis ). A solar lentigo is a flat, well- circumscribed patch. It can be round, oval or irregular in shape. Colour varies from skin-coloured, tan to dark brown or black, and size varies from a few millimetres to several centimetres in diameter. They can be slightly scaly. Solar lentigines are found as groups of similar lesions on sun-exposed sites ... A Marjolin ulcer is the rare development of cutaneous squamous cell carcinoma (SCC) in the site of a scar or ulcer. It most commonly forms at the site of an old thermal burn scar. However, Marjolin ulcers may also form from osteomyelitic lesions and, rarely, venous ulcers, pressure sores , surgical scars, animal bites, and vaccination scars [1].Telogen effluvium is the name for a common cause of temporary hair loss due to the excessive shedding of resting or telogen hair after some shock to the system. New hair continues to grow. Telogen hair is also known as a club hair due to the shape of the root. It should be distinguished from anagen effluvium, in which the hair shedding is due ...Dr Amanda Oakley. Dr Mark Duffill. Dr Marius Rademaker. Editor. Dr Ian Coulson. URL. dermnetnz .org. DermNet is a worldwide clinical resource website about dermatology …Intertrigo is due to genetic and environmental factors. Flexural skin has a relatively high surface temperature. Moisture from insensible water loss and sweating cannot evaporate due to occlusion. Friction from the movement of adjacent skin results in chafing. Intertrigo occurs more easily in environments that are hot and humid.Lipodermatosclerosis is an inflammatory skin condition resulting from underlying venous insufficiency. This is caused by: Incompetent venous valves. Venous outflow obstruction. Dysfunction of the calf muscle pump [2]. The resulting venous hypertension causes an increase of leukocytes within the veins, which then migrate into surrounding tissue.Dupilumab (Dupixent ®; Sanofi, Paris, France; Regeneron, New York, USA) is a fully human monoclonal antibody, which has shown significant efficacy and a favourable safety profile in moderate-to-severe atopic dermatitis alone and in combination with topical corticosteroids. The U.S. Food and Drug Administration (FDA) approved Dupixent ® as a ...Plant dermatitis is an inflammation of the skin caused by topical contact with a plant or plant constituent. Phytodermatitis is the formal medical name for plant dermatitis, and it may be an irritant contact dermatitis, allergic contact dermatitis, or phytophotodermatitis. Contact urticaria and mechanical irritation can also be due …Clindamycin is a lincosamide antibiotic. It is used to treat infections due to susceptible bacteria. Clindamycin can be used topically, orally or intravenously. In New Zealand (July 2017), it is available on prescription. In other countries, it may also be available as a topical foam, vaginal cream and oral suspension.Lipodermatosclerosis is an inflammatory skin condition resulting from underlying venous insufficiency. This is caused by: Incompetent venous valves. Venous outflow obstruction. Dysfunction of the calf muscle pump [2]. The resulting venous hypertension causes an increase of leukocytes within the veins, which then migrate into surrounding tissue.Annual Conference Information. General information for the annual NZDSI conference. More... NZ Dermatalogical Society Inc is a not-for-profit incorporated society of more than 60 dermatologists.Tinea corporis is spread by the shedding of fungal spores from infected skin. Transmission is facilitated by a warm, moist environment and the sharing of fomites including bedding, towels, and clothing. Dermatophyte infection elsewhere on the skin, such as tinea pedis, can also be transferred. The incubation period is 1–3 …Pigmentation disorders are often more troublesome in skin of colour. The melanocytes ( pigment cells) are located at the base of the epidermis and produce the protein melanin. Melanin is carried by keratinocytes to the skin surface. The melanocytes of dark-skinned people produce more melanin than those of people with light skin.Women and patients with skin of colour are most likely to present for medical attention. Idiopathic guttate hypomelanosis becomes more common with age, affecting <50% in the fourth decade (31–40 years), 50–80% of people over 40 years of age, and >90% in the ninth decade (81–90 years). It has been reported …Lipoedema almost exclusively affects women. Due to oestrogen receptors in the white adipose tissue, oestrogen is considered to be a major factor. Similar changes to lipoedema can occur in men with hormone disorders such as testosterone deficiency in association with cirrhosis of the liver and renal failure, testicular cancer, and hypogonadism .Feb 28, 2019 · Nodular prurigo (NP) or prurigo nodularis is a chronic skin condition characterised by very itchy firm lumps. It can appear anywhere on the body but is most common on the arms, legs, back, and torso, in a symmetrical distribution. It is the most severe form of prurigo and thus can be difficult to treat. Dermatologist – USA. One of the most easy, complete and comprehensive sources for dermatological conditions. Every topic is well written and covered completely. This site is my friend at the clinic. 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NZ Dermatalogical Society Inc is a not-for-profit incorporated society of more than 60 dermatologists.. Mujeres de guatemala

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Jan 31, 2017 · Pityriasis lichenoides (PL) is an uncommon cutaneous rash of uncertain aetiology . The acute form, pityriasis lichenoides et varioliformis acuta (PLEVA), and the chronic form, pityriasis lichenoides chronica (PLC), sit at either end of a disease spectrum with many patients showing overlapping features. The eponym Mucha–Habermann disease is ... Assessment. Assessment requires a careful history and physical examination. Identification of triggers. Irritants eg soaps and detergents (including shampoo, bubble bath, washing up liquid), chlorinated swimming pools, sodium lauryl sulphate-containing emollients; Skin infections: Staphylococcus aureus, Streptococcus pyogenes, herpes simplex (eczema …Abrocitinib is an effective systemic therapy, easy to administer as an oral medication that can be taken with or without food, and usually well tolerated. In clinical trials, it reduces the severity of atopic eczema with significant clearing of the skin and rapid improvement of itch ( pruritus) when compared to placebo.Periorificial dermatitis is a common facial skin problem characterised by groups of itchy or tender small red papules. The area around the eyes, nose, and mouth are most commonly affected, however papules may also be found on the genitals. The characteristics of facial periorificial dermatitis are as follows. Scabies is a transmissible skin disease caused by the ectoparasitic mite Sarcoptes scabiei var. hominis. This variant infests humans only; scabies cannot be caught or transferred to other animals. Scabies is a highly contagious infestation of the human epidermis. Scabies was described by Aristotle who likened the disease to ‘lice of the flesh’. Vitiligo is an acquired, chronic, depigmenting disorder of the skin, in which pigment -producing cells ( melanocytes) that determine the colour of skin, hair, and eyes are progressively lost. It appears as milky-white patches of skin ( leukoderma) and can be cosmetically very disabling, particularly in people with dark skin.Infection of internal organs, including the gastrointestinal tract, lungs, and brain ( encephalitis) Herpes zoster is infectious to people who have not previously had chickenpox. Herpes zoster in the early months of pregnancy can harm the fetus, but luckily this is rare. Shingles in late pregnancy can cause …Granuloma annulare may be a delayed hypersensitivity reaction to a component of the dermis or a reaction pattern to numerous triggers. Reported triggering events have included many skin infections and infestations, and types of skin trauma. Inflammation is mediated by tumour necrosis factor alpha ( TNF α). The reason this occurs is unknown.Different. D is for Different.. Most people have a 'signature naevus' - all their melanocytic naevi resemble each other. A melanoma appears unique and very different from the patient’s other lesions.. A pigmented lesion that is obviously different from the others is sometimes called an 'ugly duckling', 'black sheep', 'lone ranger', or 'odd-mole-out' and … Dermatomal — lesions confined to one or more segments of skin innervated by a single spinal nerve ( dermatomes ). Extensor — involving extensor surfaces of limbs. Contrast with flexor surfaces. Flexural — related to flexion, or skin folds, such as the backs of knees, the armpits, the elbow creases and the groin. Atopic hand dermatitis occurs in at least 50–60% of people with active atopic dermatitis, including children. The prevalence of hand involvement increases with age, with hand dermatitis detected in 30–40% of atopic babies and toddlers (age 0–2 years), 55% of atopic children aged 3–12 years, and 65% in those aged over 12 years.Salicylic acid belongs to a group of medicines known as keratolytics. It is used in the treatment of scaly skin diseases where the skin has become thickened, scaly and flaky. Topical preparations of salicylic acid, either alone or in combination with other medicines, can be used to treat the following common scaly skin conditions: Viral warts.Folliculitis keloidalis, or folliculitis keloidalis nuchae, is sometimes called acne cheloidalis nuchae or acne keloidalis. These names are incorrect because folliculitis keloidalis is not acne and the scars formed are not … Pruritus is the medical term for itch. Itch is an unpleasant sensation on the skin that provokes the desire to rub or scratch the area to obtain relief. Itch can cause discomfort and frustration; in severe cases it can lead to disturbed sleep, anxiety and depression. Constant scratching to obtain relief can damage the skin ( excoriation ... Jan 4, 2016 · A topical steroid is an anti- inflammatory preparation used to control eczema / dermatitis and many other skin conditions. Topical steroids are available in creams, ointments, solutions and other vehicles. Topical steroids are also called topical corticosteroids, glucocorticosteroids, and cortisone. Dermatomyositis is thought to be caused by a microangiopathy affecting skin and muscle. There is a genetic predisposition to the development of dermatomyositis such as the PTPN22 gene and HLA associations identified include: Anti-Mi-2 antibodies: HLA DRB1*07 and DQA*0201. Silica exposure — in tradespeople.Plant dermatitis is an inflammation of the skin caused by topical contact with a plant or plant constituent. Phytodermatitis is the formal medical name for plant dermatitis, and it may be an irritant contact dermatitis, allergic contact dermatitis, or phytophotodermatitis. Contact urticaria and mechanical irritation can also be due to plants.Infection of internal organs, including the gastrointestinal tract, lungs, and brain ( encephalitis) Herpes zoster is infectious to people who have not previously had chickenpox. Herpes zoster in the early months of pregnancy can harm the fetus, but luckily this is rare. Shingles in late pregnancy can cause …DermNet NZ is a comprehensive online resource for skin diseases and conditions. Learn about acne, a common chronic disorder affecting the hair follicle and sebaceous gland, its causes, features, treatment options, and …Salicylic acid belongs to a group of medicines known as keratolytics. It is used in the treatment of scaly skin diseases where the skin has become thickened, scaly and flaky. Topical preparations of salicylic acid, either alone or in combination with other medicines, can be used to treat the following common scaly skin conditions: Viral warts.Keratoacanthoma (KA) is a common, rapidly growing, locally destructive skin tumour . KAs may regress spontaneously with scarring, but clinically they may be indistinguishable from well- differentiated squamous cell carcinoma (SCC) and the clinical course may be unpredictable. Thus, many clinicians and pathologists …The features in common for benign skin lesions include: Symmetry in shape, colour and structure. Stable or slowly evolving. Absence of spontaneous bleeding (bleeding or ulceration may be due to recent injury). Benign lesions can be classified by their cellular origin: melanocytic, keratinocytic, vascular, fibrous, fat, and so on,Heat urticaria is a rare type of physical or chronic inducible urticaria. It is also called contact heat urticaria and localised heat urticaria. Heat urticaria occurs following the direct contact of a warm stimulus to the skin. The onset of urticaria is typically rapid (within minutes) and the urticaria resolves within 1–2 hours.Pruritus is the medical term for itch. Itch is an unpleasant sensation on the skin that provokes the desire to rub or scratch the area to obtain relief. Itch can cause discomfort and frustration; in severe cases it can lead to disturbed sleep, anxiety and depression. Constant scratching to obtain relief can damage the skin ( excoriation ... Chronic pigmentary disorders, particularly melasma and acquired dermal macular hyperpigmentation. Photocontact dermatitis to certain plants. Thickened skin eg, acanthosis nigricans or ichthyosis. Pigmented purpura due to bleeding into the skin, such as capillaritis or senile purpura. Segmental pigmentation disorder. Many patients with longstanding type 1 diabetes develop diabetic cheiroarthropathy or diabetic stiff skin (digital sclerosis). This results in restricted mobility of the joints of their hands and stiff, waxy, thickened and yellowed skin. This is thought to be due to the reaction of glucose with proteins in the skin and increased glycation end ...Infection of internal organs, including the gastrointestinal tract, lungs, and brain ( encephalitis) Herpes zoster is infectious to people who have not previously had chickenpox. Herpes zoster in the early months of pregnancy can harm the fetus, but luckily this is rare. Shingles in late pregnancy can cause … Chronic spontaneous urticaria refers to chronic urticaria that has no specific cause or trigger. Weals are present on most days of the week for 6 weeks or more. Chronic spontaneous urticaria was previously referred to as chronic idiopathic urticaria. This term is no longer used as many cases have an autoimmune basis. Cherry angioma. Cherry angiomas are extremely common benign red, blue, purple or almost black lesions occurring in middle age on the trunk. They can be easily distinguished from melanocytic lesions by dermoscopy, which shows red, blue or purple lacunes. Occasionally they become thrombosed and may fall off or persist as a firm bluish papule.Dermatology resources for medical students. Welcome to DermNet’s medical student resource centre. This centre has been designed to help increase your confidence and …Dermatologist – USA. One of the most easy, complete and comprehensive sources for dermatological conditions. Every topic is well written and covered completely. This site is …Prurigo simplex presents as symmetrically distributed, small, intensely itchy, dome-shaped bumps. Sometimes there are tiny blisters. They are most numerous on the outer aspects of the limbs and buttocks, but may occur anywhere on head and neck, trunk and limbs. Prurigo may affect children and adults. Aternative names for prurigo simplex include ...Jan 31, 2019 · 17.8% were aged 50-59. 23.9% were aged 60-69. 23.7% were aged 70-79. 16% were aged 80 or older. The mean age for melanoma diagnosis is 65.7 years among men and 62.4 years among women. Melanoma is the most common cancer diagnosed in young Australians aged 15–29 years, accounting for 15% of all cancers in this age group. Jan 4, 2016 · A topical steroid is an anti- inflammatory preparation used to control eczema / dermatitis and many other skin conditions. Topical steroids are available in creams, ointments, solutions and other vehicles. Topical steroids are also called topical corticosteroids, glucocorticosteroids, and cortisone. The usual presentation of the disease is classical lichen planus. Symptoms can range from none (uncommon) to intense itch. Papules and polygonal plaques are shiny, flat-topped, and firm on palpation. The plaques are crossed by fine white lines called Wickham striae. Onycholysis can affect a single nail or multiple fingernails and/or toenails. The distal part of the nail is most commonly affected lifting the free edge; sometimes the nail may detach laterally or proximally. Oil spot sign is an island of onycholysis under a nail. Clinical features can include the following signs.Skin needling is used for facial rejuvenation and to reduce fine lines and wrinkles, improve skin tone, texture, and pigmentation. There is a reduced risk of hyperpigmentation and scarring with skin needling compared to more invasive procedures, and as such, it is safer on ethnic or dark skin. It is suitable for thin and sensitive skin.Jan 4, 2016 · A topical steroid is an anti- inflammatory preparation used to control eczema / dermatitis and many other skin conditions. Topical steroids are available in creams, ointments, solutions and other vehicles. Topical steroids are also called topical corticosteroids, glucocorticosteroids, and cortisone. The solar (actinic) keratosis is the most common precursor lesion for squamous cell carcinoma. Histologically, atypical keratinocytes are found in the basal layer of the epidermis. Actinic keratoses are found on sun-exposed sites, mainly face, ears and hands. They are often multiple and have a hard scaly surface without induration …Malignancy. Cutaneous cysts and pseudocysts are non- proliferative benign lesions. Nodulocystic basal cell carcinoma is a common skin cancer that presents as a rounded nodule and may initially be mistaken for a cyst, but steady enlargement, destruction of the epidermis with ulceration and bleeding occur eventually.Tinea corporis is spread by the shedding of fungal spores from infected skin. Transmission is facilitated by a warm, moist environment and the sharing of fomites including bedding, towels, and clothing. Dermatophyte infection elsewhere on the skin, such as tinea pedis, can also be transferred. The incubation period is 1–3 …Pityriasis rosea is a self-limiting rash, which resolves in about 6–10 weeks. It is characterised by a large circular or oval "herald patch ", usually found on the chest, abdomen, or back. The herald patch …Dermatologist – USA. One of the most easy, complete and comprehensive sources for dermatological conditions. Every topic is well written and covered completely. This site is my friend at the clinic. Thank you for your effort.Irritant contact dermatitis develops when chemical or physical agents damage the skin surface faster than the skin can repair. Irritants remove oils and natural moisturising factor from the outer layer of the skin, allowing chemical irritants to penetrate the skin barrier and trigger inflammation. Factors influencing the development and ...Pigmentation disorders are often more troublesome in skin of colour. The melanocytes ( pigment cells) are located at the base of the epidermis and produce the protein melanin. Melanin is carried by keratinocytes to the skin surface. The melanocytes of dark-skinned people produce more melanin than those of people …Learn about pityriasis rosea, a self-limiting rash that causes a large circular or oval patch on the chest, abdomen, or back. Find out the causes, symptoms, diagnosis, treatment, and …Pyogenic granuloma of the skin presents as a painless red fleshy nodule, typically 5-10mm in diameter, that grows rapidly over a few weeks. The surface is initially smooth but can ulcerate, become crusty, or verrucous. Pyogenic granuloma is usually solitary, but multiple nodules and satellite lesions can erupt.Hairy tongue is an unusual, harmless condition characterised by a 'hairy' enlargement and discolouration of the filiform papillae. The filiform papillae are tiny conical bumps found on the surface of the front two-thirds of the tongue that do not carry taste buds. It is also known as black hairy tongue and lingua villosa nigra.Pyogenic granuloma of the skin presents as a painless red fleshy nodule, typically 5-10mm in diameter, that grows rapidly over a few weeks. The surface is initially smooth but can ulcerate, become crusty, or verrucous. Pyogenic granuloma is usually solitary, but multiple nodules and satellite lesions can erupt.Dermoscopy quiz (2 of 3) Dermoscopy quiz (3 of 3) Different causes of purpura – 10 cases. Eczema – 14 cases. Fungal infections – 12 cases. Hair loss – 14 cases. Irritant contact dermatitis – 12 cases. Irritating skin problems affecting the axilla – 10 cases. Leg rashes and unwell – 10 cases.Pyogenic granuloma of the skin presents as a painless red fleshy nodule, typically 5-10mm in diameter, that grows rapidly over a few weeks. The surface is initially smooth but can ulcerate, become crusty, or verrucous. Pyogenic granuloma is usually solitary, but multiple nodules and satellite lesions can erupt.A list of the most commonly used key terms and phrases in dermatology. Keratoacanthoma (KA) is a common, rapidly growing, locally destructive skin tumour . KAs may regress spontaneously with scarring, but clinically they may be indistinguishable from well- differentiated squamous cell carcinoma (SCC) and the clinical course may be unpredictable. Thus, many clinicians and pathologists prefer the term SCC, KA-type ... Basal cell carcinoma (BCC) is a common, locally invasive, keratinocyte cancer (also known as nonmelanoma cancer). It is the most common form of skin cancer. BCC is also known as rodent ulcer and basalioma. Patients with BCC often develop multiple primary tumours over time. Heat urticaria is a rare type of physical or chronic inducible urticaria. It is also called contact heat urticaria and localised heat urticaria. Heat urticaria occurs following the direct contact of a warm stimulus to the skin. The onset of urticaria is typically rapid (within minutes) and the urticaria resolves within 1–2 hours.A venous lake is usually easy to diagnose clinically by its appearance. The colour disappears on compression of the macule or papule due to the clearance of blood from the dilated venule. This is most easily seen using a glass slide or the lens of a contact dermatoscope. A venous lake has a structureless blue or purple appearance on …Intense pulsed light (IPL) or flashlamp therapy is a non- invasive and non- ablative treatment that uses high-intensity pulses of visible light to improve the appearance of the following skin problems: Vascular lesions including spider telangiectasis, port wine stains, broken facial veins, rosy cheeks, rosacea and red thread veins of the legs.It is also known as lymphostatic verrucosis, elephantiasis crurum papillaris et verrucosa, ‘mossy leg’, lymphangitis recurrens elephantogenica, and lymphostatic papillomatosis cutis. ‘Nostras’ is a term used to describe the non- filiarial form of elephantiasis. Gross hyperkeratosis and nodularity in ENV. Lymphoedema over the toes with ... Pityriasis rosea is a self-limiting rash, which resolves in about 6–10 weeks. It is characterised by a large circular or oval "herald patch ", usually found on the chest, abdomen, or back. The herald patch is followed some time later, typically two weeks or so, by the development of smaller scaly oval red patches, resembling a Christmas tree ... Dermatomal — lesions confined to one or more segments of skin innervated by a single spinal nerve ( dermatomes ). Extensor — involving extensor surfaces of limbs. Contrast with flexor surfaces. Flexural — related to flexion, or skin folds, such as the backs of knees, the armpits, the elbow creases and the groin. NB-UVB phototherapy clears about 75% of patients, where clearance is defined as 90% or greater reduction in the extent of psoriasis compared to baseline. The number of treatments required ranges from 10 to 40, delivered two to five times weekly. BB-UVB clears a smaller proportion and a greater number of treatments may be required.DermNet NZ revision January 2021. Table of contents What is leprosy? Leprosy, also called Hansen disease, is a chronic bacterial infection primarily affecting the skin and peripheral nerves usually caused by Mycobacterium leprae. The form the disease takes depends on the person’s immune response to the infection. ... DermNet Cases. DermNet now features a library of authentic patient cases with images. These cover the various symptoms, diagnosis, treatments, and outcomes that can be expected in the real world. You'll find these cases listed below. All of our content is written by medical professionals and reviewed by dermatologists before being published. A melanocytic naevus (American spelling ‘ nevus ’), or mole, is a common benign skin lesion due to a local proliferation of pigment cells ( melanocytes ). It is sometimes called a naevocytic naevus or just 'naevus' (but note that there are other types of naevi ). A brown or black melanocytic naevus contains the pigment melanin, so may also ...Confluent and reticulated papillomatosis is an uncommon skin condition affecting the trunk, neck and axillae. It is characterised by asymptomatic, hyperpigmented papules and plaques that have a peripheral, net-like … Seborrhoeic keratosis is a harmless warty spot that appears during adult life as a common sign of skin ageing. Some people have hundreds of them. Seborrhoeic keratosis (American spelling - seborrheic keratosis) is also called SK, basal cell papilloma, senile wart, brown wart, wisdom wart, or barnacle. The descriptive term, benign keratosis, is ... See full list on dermnetnz.org Patch testing is undertaken for the investigation and confirmation of substances that produce allergic contact dermatitis. It involves applying appropriately diluted allergens to the skin, usually on the back for convenience, for 48 hours. 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