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To make authoritative information about the skin available to anyone in the world with an internet connection.
DermNet NZ was founded 23 years ago by a group of Dermatologists from New Zealand. It has become a world-renowned resource of skin disease information.
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Trichothiodystrophy
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Skin tension lines
What are skin tension lines?Skin tension lines represent a map of the direction in which the tension in the skin...
Chlamydia
Chlamydia is a sexually transmitted infection caused by the bacterium Chlamydia trachomatis with the serotypes D-K.
Airborne contact dermatitis
What is airborne contact dermatitis?Airborne contact dermatitis refers to acute and chronic dermatitis of exposed parts of the body, especially...
Compulsive hand washing
What is compulsive hand washing?Patients with compulsive hand washing perform excessive and repetitive washing of their hands in an attempt...
Chronic pruritus of unknown origin
What is chronic pruritus of unknown origin?Chronic pruritus of unknown origin is defined as an itch lasting greater than six...
EB with congenital absence of skin
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Onychogryphosis
What is onychogryphosis?Onychogryphosis, also known as ‘Ram’s horn’ nail, is a form of nail disorder resulting from slow nail plate...
Benzalkonium chloride contact dermatitis
What is benzalkonium chloride?Benzalkonium chloride is a quaternary ammonium cationic detergent.
Chilblain lupus erythematosus
What is chilblain lupus erythematosus?Chilblain lupus erythematosus (LE) is a rare variant of chronic cutaneous LE and was originally described...
Skin Cancer and Self-Exams
Sponsored content: melanomas are notoriously difficult to discover and diagnose.
Hereditary angioedema
What is hereditary angioedema?Hereditary angioedema (HAE) is a familial disease characterised by recurrent attacks of self-limiting oedema that can affect...
Key clinical-trial evidence for risankizumab
IntroductionIn March 2019, risankizumab (trade name SKYRIZI™) received US Food and Drug Administration (FDA) for the treatment of moderate-to-severe plaque...
Risankizumab
What is risankizumab?Risankizumab is a biological medicine used for psoriasis, a skin disorder in which skin cells form scaly red...
Hyperbaric oxygen therapy
What is hyperbaric oxygen therapy?Hyperbaric oxygen therapy is a treatment in which a patient breathes pure oxygen while subject to...
Laser therapy in skin of colour
What is skin of colour?Skin of colour refers generally to non-white skin types with a particular emphasis on Fitzpatrick skin...
Blisters and pustules in neonates
IntroductionThis page describes vesiculobullous and pustular lesions in newborns and their differentiating characteristics.
Subacute cutaneous lupus erythematosus
What is subacute cutaneous lupus erythematosus?Subacute cutaneous lupus (SCLE) is a subtype of cutaneous lupus erythematosus.
Colloid milium
What is colloid milium?Colloid milium refers to a group of rare, degenerative, cutaneous deposition disorders.
Annular erythema images
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Spondyloarthropathy
What is a spondyloarthropathy?Spondyloarthropathy refers to a group of five seronegative inflammatory rheumatic disorders that are related in disease manifestation...
Erythema annulare centrifugum
What is erythema annulare centrifugum?Erythema annulare centrifugum (EAC) is a chronic reactive form of annular erythema characterised by erythematous, circular,...
Tick bite induced red meat allergy
What is tick bite induced red meat allergy?Tick bite induced red meat allergy is an allergy to the carbohydrate galactose-alpha-1,3-galactose...
Ethnic dermatology
What is ethnic dermatology?Ethnic dermatology is an area of interest dedicated to the presentation, diagnosis, and management of skin disorders...
Emollients for eczema
What is an emollient?Emollients are topical moisturising agents used to alleviate itchiness and other discomforts associated with eczema.
Wound cleansers
What are wound cleansers?Wound cleansers are rinsing solutions used to remove foreign materials on a wound surface and its surrounding...
Urticaria in children
What is urticaria in children?Urticaria relates to a group of conditions in which weals (hives) or angioedema (swelling) develop in...
Psychological effects of hair loss
What is hair loss?Hair loss (alopecia) is a common problem that affects up to 50% of men and women throughout...
Splinter haemorrhage
What is a splinter haemorrhage?A splinter haemorrhage is a longitudinal, red-brown haemorrhage under a nail and looks like a wood...
IgE tests
What is immunoglobulin E?Immunoglobulin E (IgE) is an antibody produced during a type I hypersensitivity reaction to an allergen.
Aeroallergens and the skin
What are aeroallergens?Aeroallergens are various airborne substances or inhalants, such as pollens, spores, and other biological or non-biological airborne particles...
Peanut allergy
What is peanut allergy?Peanut allergy is an adverse immune response to a peanut allergen.
Fibroepithelioma of Pinkus
What is fibroepithelioma of Pinkus?Fibroepithelioma of Pinkus, also known as Pinkus tumour and Pinkus epithelioma, is a premalignant fibroepithelial tumour...
Spindle cell melanoma
What is spindle cell melanoma?Spindle cell melanoma is a rare histological variant of melanoma, characterised by the presence of spindle-shaped...
Legius syndrome
What is Legius syndrome?Legius syndrome is a rare genetic disorder that was first described in 2007 [1].
Annular lichenoid dermatitis of youth
What is annular lichenoid dermatitis of youth?Annular lichenoid dermatitis of youth is a rare skin condition that was first described...
Erythema gyratum repens
What is erythema gyratum repens?Erythema gyratum repens is a rare paraneoplastic type of annular erythema with a distinctive figurate ‘wood-grain’...
Chronic spontaneous urticaria
What is urticaria?Urticaria is a condition characterised by the presence of weals (hives) and angioedema [1,2].
Chronic inducible urticaria
Chronic inducible urticaria is chronic urticaria that has an attributable cause or trigger and is classified according to the stimulus...
Periorificial dermatitis in children
What is periorificial dermatitis?Periorificial dermatitis in children typically presents as multiple small papules around the mouth, nose, and eyes.
Naevus simplex
What is naevus simplex?Naevus simplex is a common, benign capillary vascular malformation.
Hypogonadism in males
What is hypogonadism?Hypogonadism describes the inadequate function of the gonads (reproductive glands) leading to impaired production of germ cells and...
Dermatopathology topics
Eruptive xanthoma
IntroductionEruptive xanthoma presents as crops of pink papules which are often pruritic.
Juvenile xanthogranuloma
Juvenile xanthogranuloma usually presents in younger individuals as smooth pink or yellow nodules.
Verrucous haemangioma
IntroductionVerrucous haemangioma presents as blue-red, vascular papules, plaques or nodules, which later become warty in appearance.
Myiasis
Myiasis is infestation by the larvae of fly species within the arthropod order Diptera (the adult flies are two-winged).
Systemic amyloidosis
IntroductionSystemic amyloidosis caused by the buildup of amyloid in various organs.
Lichenoid drug eruption
IntroductionLichenoid drug reactions are induced by a medication or another exogenous source which can mimic other lichenoid dermatoses clinically and...
Sclerosing lipogranuloma
IntroductionSclerosing lipogranuloma usually presents as a painless or slightly tender, indurated mass on the penis, scrotum, spermatic cord and perineum.
Glomeruloid haemangioma
Glomeruloid haemangioma is a rare benign cutaneous vascular proliferation that typically arises in patients with a history of POEMS syndrome.
Splenosis
Splenosis may present in the skin following splenic trauma and subsequent spread of benign splenic tissue into surrounding structures.
Epithelioid haemangioma
IntroductionEpithelioid hemangioma is a benign vascular lesion of the skin or deeper structures (bone).
Cutaneous larva migrans
IntroductionCutaneous larva migrans is a parasitic skin infection caused by helminth larvae that usually infest cats, dogs and other animals.
Mesothelioma
IntroductionMesothelioma is a malignant tumour arises from mesothelial lining of pleura, peritoneum, pericardium and tunica vaginalis — pleural mesothelioma is...
Chickenpox
IntroductionChickenpox is caused by primary infection with the varicella-zoster virus, of the Herpesviridae family.
Synovial sarcoma
IntroductionSynovial sarcoma is usually an aggressive deep seated mass presenting around large joints (80% in knee and ankle) in young...
Clear cell fibrous papule
IntroductionClear cell fibrous papule is a rare variant of fibrous papule that has a clinical presentation identical to conventional fibrous...
Childhood infections
Meningococcal disease
What is meningococcal disease?Meningococcal disease is an illness caused by the bacteria Neisseria meningitidis.
Measles
What is measles?Do you have confirmed measles?
Chickenpox
Chickenpox is a highly contagious viral infection that causes an acute fever and blistered rash, mainly in children.
Fifth disease
What is erythema infectiosum?Erythema infectiosum is a common childhood infection causing a slapped cheek appearance and a rash.
Pityriasis rosea
Pityriasis rosea is a viral rash which lasts about 6–12 weeks. It is characterised by a herald patch followed by...
Impetigo
What is impetigo?Impetigo is a common acute superficial bacterial skin infection (pyoderma).
Boil
What is a boil?A boil (also called a furuncle) is a deep form of bacterial folliculitis (infection of a hair...
Hand foot and mouth disease
What is hand foot and mouth disease?Hand foot and mouth disease (HFM) is a common mild and short-lasting viral infection...
Papular acrodermatitis
What is papular acrodermatitis of childhood?Papular acrodermatitis of childhood is a characteristic response of the skin to viral infection in...
Molluscum contagiosum
What is molluscum contagiosum?Molluscum contagiosum is a common viral skin infection of childhood that causes localised clusters of epidermal papules...
VIral warts
What is a viral wart?A viral wart is a very common growth of the skin caused by infection with human...
Head lice
What are head lice?Head lice are small, wingless insects that infest the human scalp.
Scabies
What is scabies?Scabies is a very itchy rash caused by a parasitic mite that burrows in the skin surface.
Guidelines for authors
Are you interested in writing for us? DermNet New Zealand is always looking for potential authors to write on new topics. Potential authors interested in writing a new page are generally asked to write a topic page about a disease or condition, or a treatment, product or procedure.
