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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. 

Recently added pages

Splinter haemorrhage

A splinter haemorrhage is a longitudinal, red-brown haemorrhage under a nail and looks like a wood splinter.

23 February 2019

IgE tests

IgE is an abbreviation for immunoglobulin E, an antibody produced during a Type 1 hypersensitivity reaction to an allergen.

24 February 2019

Aeroallergens and the skin

Aeroallergens are various airborne substances or inhalants, such as pollens, spores, and other biological or non-biological airborne particles that can...

1 March 2019

Peanut allergy

Peanut allergy is an adverse immune response to a peanut allergen.

6 February 2019

Fibroepithelioma of Pinkus

What is fibroepithelioma of Pinkus?Fibroepithelioma of Pinkus, also known as Pinkus tumour and Pinkus epithelioma, is a premalignant fibroepithelial tumour...

6 February 2019

Spindle cell melanoma

Spindle cell melanoma is a rare histological variant of melanoma characterised by the presence of spindle-shaped melanocytes [1].

27 January 2019

Legius syndrome

Legius syndrome is a rare genetic disorder first described in 2007 [1].

26 January 2019

Annular lichenoid dermatitis of youth

Annular lichenoid dermatitis of youth is a rare skin condition first described in 2003 [1].

22 January 2019

Erythema gyratum repens

Erythema gyratum repens is a rare paraneoplastic type of annular erythema with a distinctive figurate ‘wood-grain’ appearance.

24 March 2019

Chronic spontaneous urticaria

Urticaria is a condition characterised by the presence of hives/weals (also spelt wheals) and/or angioedema [1,2].

14 March 2019

Chronic inducible urticaria

Chronic inducible urticaria is chronic urticaria that has an attributable cause or trigger and is classified according to the stimulus...

14 March 2019

Periorificial dermatitis in children

Periorificial dermatitis in children typically presents as multiple small papules around the mouth, nose and eyes.While the name is suggestive...

14 January 2019

Naevus simplex

Naevus simplex is a common, benign capillary vascular malformation.

6 January 2019

Hypogonadism in males

Hypogonadism describes the inadequate function of the gonads with impaired production of germ cells and sex hormones. What is hypogonadism in males?Hypogonadism...

22 January 2019

Dermatopathology topics

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Eruptive xanthoma

Eruptive xanthoma presents as crops of pink papules which are often pruritic.

27 February 2019

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Juvenile xanthogranuloma

Juvenile xanthogranuloma usually presents in younger individuals as smooth pink or yellow nodules.

27 February 2019

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Verrucous haemangioma

Verrucous haemangioma presents as blue-red, vascular papules, plaques or nodules, which later become warty in appearance.

6 January 2019

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Myiasis

Myiasis is infestation by the larvae of fly species within the arthropod order Diptera (the adult flies are two-winged).

6 January 2019

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Systemic amyloidosis

Systemic amyloidosis caused by the buildup of amyloid in various organs.

6 January 2019

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Lichenoid drug eruption

Lichenoid drug reactions are induced by a medication or another exogenous source which can mimic other lichenoid dermatoses clinically and...

6 January 2019

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Sclerosing lipogranuloma

Sclerosing lipogranuloma usually presents as a painless or slightly tender, indurated mass on the penis, scrotum, spermatic cord and...

6 January 2019

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Glomeruloid haemangioma

Glomeruloid haemangioma is a rare benign cutaneous vascular proliferation that typically arises in patients with a history of POEMS...

27 February 2019

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Splenosis

Splenosis may present in the skin following splenic trauma and subsequent spread of benign splenic tissue into surrounding structures.

6 January 2019

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Epithelioid haemangioma

Epithelioid hemangioma is a benign vascular lesion of the skin or deeper structures (bone).

27 February 2019

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Cutaneous larva migrans

Cutaneous larva migrans is a parasitic skin infection caused by helminth larvae that usually infest cats, dogs and other...

27 February 2019

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Mesothelioma

Mesothelioma is a malignant tumour arises from mesothelial lining of pleura, peritoneum, pericardium and tunica vaginalis — pleural mesothelioma is the...

6 January 2019

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Chickenpox

Chickenpox is caused by primary infection with the varicella-zoster virus, of the Herpesviridae family.

27 February 2019

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Synovial sarcoma

Synovial sarcoma is usually an aggressive deep seated mass presenting around large joints (80% in knee and ankle) in young...

6 January 2019

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Clear cell fibrous papule

Clear cell fibrous papule is a rare variant of fibrous papule that has a clinical presentation identical to conventional fibrous...

27 February 2019

Focus on human papillomavirus

Condom pack
Sexually acquired human papillomavirus

Human papillomavirus (HPV) is a DNA virus of the papillomavirus family.

5 October 2017

Viral warts
Viral wart

A viral wart is a very common growth of the skin caused by infection with human papillomavirus (HPV).

3 May 2016

Scrotal wart
Vaccines against HPV

Certain subtypes of human papillomavirus (HPV), the cause of viral warts, are classified as sexually transmitted infections (STIs).

5 October 2017

 Papillomavirus
Anogenital wart

An anogenital wart is a common superficial skin lesion in the anogenital area that is caused by human papillomavirus...

3 May 2016

Squmaous cell papilloma or viral wart
Squamous cell papilloma

Squamous cell papilloma is caused by infection with the human papillomavirus.

3 May 2016

Koilocyte
Focal epithelial hyperplasia

Focal epithelial hyperplasia is the results of a specific human papillomavirus (HPV) infection in the mouth.

3 May 2016

Oral cancer
Oral cancer

Over 90% of oral cancers are squamous cell carcinomas.

3 May 2016

Pathology of vulval intraepithelial neoplasia
Lower anogenital squamous terminology

The evolution of terminology used to describe vulval intraepithelial neoplasia.

3 May 2016

Penile intraepithelial neoplasia pathohlogy
Anogenital SCC

Link to our pages on invasive and intraepithelial forms of anogenital carcinoma.

25 September 2017

Vulvar intraepithelial neoplasia
VIN

Vulval (or vulvar) intraepithelial neoplasia is a pre-cancerous skin lesion

3 May 2016

colposcope
Vulval cancer

Over 90% of vulval cancers are squamous cell carcinomas.

3 May 2016

Penile intraepithelial neoplasia pathology
PIN

Penile intraepithelial neoplasia is a rare pre-cancerous disease of the penis.

3 May 2016

Low-grade SIL with HPV effect  cytology
Anal cancer

Anal cancer is a rare malignant tumour which grows in or around the anus.

3 May 2016

bowenoid papulosis pathology
Bowenoid papulosis

Bowenoid papulosis is a rare form of intraepithelial neoplasia.

3 May 2016

Epidermodysplasia verruciformis
Epidermodysplasia verruciformis

Epidermodysplasia verruciformis (EV) is a rare, autosomal recessive inherited skin disorder characterised by a chronic eruption of brownish plaques. 

3 May 2016

Epidermodysplasia verruciformis  pathology
Epidermodysplasia verruciformis pathology

Epidermodysplasia verruciformis (EV) is a rare autosomal recessive genodermatosis due to mutations of the EVER1/TMC6 or EVER2/TMC8 genes which result in...

3 May 2016

xx   pathology
Verruca plana pathology

Verruca plana (plane warts) are typically associated with human papillomavirus (HPV) types 2, 3, and 10.

3 May 2016

Verruca vulgaris   pathology
Verruca vulgaris pathology

Verruca vulgaris (common warts) are keratotic lesions caused by infection by various subtypes of the DNA virus, human papillomavirus (HPV).Histology...

3 May 2016

Condyloma acuminatum  pathology
Condyloma acuminatum pathology

Condyloma acuminatum is the name given to anogenital warts.

3 May 2016

Childhood infections

Meningococcal petechiae
Meningococcal disease

Meningococcal disease is an illness caused by the bacteria Neisseria meningitidis.

3 May 2016

Measles
Measles

Measles is a highly contagious viral infection causing fever and a rash. Early symptoms are like the common cold, with conjunctivitis...

3 May 2016

Chickenpox
Chickenpox

Chickenpox is a highly contagious viral infection that causes an acute fever and blistered rash, mainly in children.

3 May 2016

Fifth disease
Fifth disease

Erythema infectiosum is a common childhood infection causing a slapped cheek appearance and a rash.

3 May 2016

Herald patch: pityriasis rosea
Pityriasis rosea

Pityriasis rosea is a viral rash which lasts about 6–12 weeks. It is characterised by a herald patch followed by...

3 May 2016

Impetigo
Impetigo

What is impetigo?Impetigo is a common acute superficial bacterial skin infection (pyoderma).

3 May 2016

Boil
Boil

A boil (also called a furuncle) is a deep form of bacterial folliculitis (infection of a hair follicle).What are the clinical...

3 May 2016

Vesicles on palm in hand foot and mouth disease
Hand foot and mouth disease

Hand foot and mouth disease (HFM) is a common mild and short-lasting viral infection most often affecting young children.

3 May 2016

Infantile papular acrodermatitis
Papular acrodermatitis

Infantile papular acrodermatitis is a characteristic response of the skin to viral infection in which there is a papular rash...

3 May 2016

Molluscum contagiosum
Molluscum contagiosum

Molluscum contagiosum is a common viral skin infection of childhood that causes localised clusters of epidermal papules called mollusca.Who gets...

3 May 2016

Viral warts
VIral warts

A viral wart is a very common growth of the skin caused by infection with human papillomavirus (HPV).

3 May 2016

Head louse
Head lice

Head lice are small, wingless insects than infest the human scalp.

3 May 2016

Scabies
Scabies

Scabies is a very itchy rash caused by a parasitic mite that burrows in the skin surface.

3 May 2016

Slider: Childhood infections

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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 on either a disease or condition, or a treatment, product or procedure. 

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