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DermNet NZ was launched in 1996 by a group of Dermatologists from New Zealand. It has become a world-renowned resource of skin disease information.
Please note that DermNet’s page is a summary about COVID-19 and may quickly become outdated.
An isocyanate is an organic compound used in the production of polyurethane foams, resins, coatings, and adhesives .
Angioimmunoblastic T-cell lymphoma is a rare nodal peripheral T-cell lymphoma (PTCL) that results in systemic symptoms and profound immune deficiency...
Contact dermatitis is an eczematous skin reaction arising from direct contact with a causative agent.
Cutaneous dysaesthesia is a condition defined as an unpleasant and abnormal sensation in the skin.
Non-albicans candida infections are fungal infections caused by the Candida species of yeast other than C.
Lymphocytic thrombophilic arteritis is characterised by a primary lymphocytic vasculitis.
Urticaria is a common skin reaction characterised by weals, which are caused by the release of histamine and other vasoactive...
Macular amyloidosis is one of three forms of primary localised cutaneous amyloidosis.
Cannabis refers to one of two notable subspecies of the cannabis plant.
Eruptive xanthoma presents as crops of pink papules which are often pruritic.
Juvenile xanthogranuloma usually presents in younger individuals as smooth pink or yellow nodules.
Verrucous haemangioma presents as blue-red, vascular papules, plaques or nodules, which later become warty in appearance.
Myiasis is infestation by the larvae of fly species within the arthropod order Diptera (the adult flies are two-winged).
Systemic amyloidosis caused by the buildup of amyloid in various organs.
Lichenoid drug reactions are induced by a medication or another exogenous source which can mimic other lichenoid dermatoses clinically and...
Sclerosing lipogranuloma usually presents as a painless or slightly tender, indurated mass on the penis, scrotum, spermatic cord and perineum.
Glomeruloid haemangioma is a rare benign cutaneous vascular proliferation that typically arises in patients with a history of POEMS syndrome.
Splenosis may present in the skin following splenic trauma and subsequent spread of benign splenic tissue into surrounding structures.
Epithelioid hemangioma is a benign vascular lesion of the skin or deeper structures (bone).
Cutaneous larva migrans is a parasitic skin infection caused by helminth larvae that usually infest cats, dogs and other animals.
Mesothelioma is a malignant tumour arises from mesothelial lining of pleura, peritoneum, pericardium and tunica vaginalis — pleural mesothelioma is...
Chickenpox is caused by primary infection with the varicella-zoster virus, of the Herpesviridae family.
Synovial sarcoma is usually an aggressive deep seated mass presenting around large joints (80% in knee and ankle) in young...
Clear cell fibrous papule is a rare variant of fibrous papule that has a clinical presentation identical to conventional fibrous...
Meningococcal disease is an illness caused by the bacteria Neisseria meningitidis.
Measles is a highly contagious viral infection causing fever and a rash. Early symptoms are like the common cold, with...
Chickenpox is a highly contagious viral infection that causes an acute fever and blistered rash, mainly in children.
Erythema infectiosum is a common childhood infection causing a slapped cheek appearance and a rash.
Pityriasis rosea is a viral rash which lasts about 6–12 weeks. It is characterised by a herald patch followed by...
Impetigo is a common acute superficial bacterial skin infection (pyoderma).
A boil (also called a furuncle) is a deep form of bacterial folliculitis (infection of a hair follicle).
Hand foot and mouth disease (HFM) is a common mild and short-lasting viral infection most often affecting young children.
Papular acrodermatitis of childhood is a characteristic response of the skin to viral infection in which there is a papular...
Molluscum contagiosum is a common viral skin infection of childhood that causes localised clusters of epidermal papules called mollusca.
A viral wart is a very common growth of the skin caused by infection with human papillomavirus (HPV).
Head lice are small, wingless insects that infest the human scalp.
Scabies is a very itchy rash caused by a parasitic mite that burrows in the skin surface.
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