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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 22 years ago by a group of Dermatologists from New Zealand. It has become a world-renowned resource of skin disease information.

Recently added pages

Bird mite infestation

Bird mites are minute (less than 1 mm long), oval-shaped arachnids with 8 legs.

18 September 2018

Skin cancer apps

In an article sponsored by Miiskin, we discuss technology that supports self skin examination.

23 October 2018

Porokeratosis ptychotropica

Porokeratosis refers to a group of disorders characterised by abnormal keratinisation.

4 September 2018

Picosecond laser

A picosecond laser is a laser device that uses very short pulse durations to target endogenous pigmentation and exogenous ink particles...

3 September 2018

Tranexamic acid

Tranexamic acid is an anti-fibrinolytic agent, and is commonly used for heavy menstrual bleeding.

17 September 2018

Intralymphatic histiocytosis

Intralymphatic histiocytosis is a rare benign chronic skin condition most commonly associated with rheumatoid arthritis, orthopaedic metal implants, or cancer...

22 September 2018

Hidradenitis suppurativa guidelines

Hidradenitis suppurativa is a debilitating and distressing chronic inflammatory skin disease affecting about one in every 150 Australians.

20 September 2018

Cellulitis mimics

Cellulitis is an acute bacterial infection of the dermis and subcutaneous tissues of the skin.

8 August 2018

Intravascular lymphoma

Intravascular lymphoma is a rare subtype of large B-cell lymphoma in which lymphoma cells proliferate within the lumen of small...

3 August 2018

Nipple eczema

Nipple eczema is a localised dermatitis involving the nipple and areola, and is characterised by erythema and scaling.

29 September 2018

Carcinoma cuniculatum

Carcinoma cuniculatum is a rare, slow-growing variant of cutaneous squamous cell carcinoma (SCC).

19 August 2018

Linea nigra

Linea nigra is a physiological form of hyperpigmentation commonly seen in the first trimester of pregnancy [1–3].

4 September 2018

Convolutional neural networks in dermatology

A convolutional neural network (CNN) is a type of deep artificial neural network used in image processing.

27 September 2018

Lichen simplex of the vulva

Lichen simplex of the vulva is a pruritic form of dermatitis in which excessive scratching or rubbing leads to lichenification.

24 September 2018

Tildrakizumab

In March 2018, tildrakizumab (Ilumya™; Sun Pharma India) received US Food and Drug Administration (FDA) approval for the treatment of...

5 September 2018

Contact allergy to bufexamac

Bufexamac is a topical non-steroidal anti-inflammatory drug (NSAID).

2 September 2018

Lichen simplex of the scrotum

Lichen simplex of the scrotum is a pruritic form of dermatitis in which excessive scratching or rubbing leads to lichenification.

24 September 2018

Melanocortin 1 receptor gene

Melanocytes make two forms of melanin in the skin, hair, and eyes. 

9 September 2018

Medical hypnosis

Hypnosis, or hypnotherapy, induces someone to enter into a 'trance state' using deep breathing and relaxation, meditation and guided imagery. It mandates...

4 September 2018

Blood-based melanoma detection

Cutaneous melanoma is generally first suspected during a skin check and the diagnosis is confirmed by a positive skin...

9 September 2018

Acne in children

Prepubertal acne has been classified into the following age groups by a panel convened by the American Acne and Rosacea...

17 October 2018

Keratoelastoidosis marginalis

Keratoelastoidosis marginalis is an acquired form of marginal keratoderma.

19 August 2018

Atypical solar lentigo

An atypical solar lentigo is a solar lentigo with unusual characteristics.

2 September 2018

Atopy patch test

The classical tests for immediate type I hypersensitivity (allergy) are specific immunoglobulin E (IgE) antibody levels, such as the radioallergosorbent test...

30 August 2018

Listeriosis

Listeriosis is a bacterial infection caused by the bacteria Listeria monocytogenes.

24 March 2018

Prader-Willi syndrome

Prader–Willi syndrome is the most common genetic cause of obesity.  It was first described in 1887 by John Langdon Down,...

17 September 2018

Guselkumab

Guselkumab is a biological treatment indicated for moderate-to-severe psoriasis.The US Food and Drug Administration (FDA) has approved guselkumab (Tremfya™, Janssen...

7 July 2018

Rickettsia typhi

Rickettsiae are small, obligate intracellular, Gram-negative bacteria that spend part of their life cycle in an arthropod host (eg, a tick,...

3 August 2018

Climate change and skin

Climate change is a lasting alteration in patterns of weather caused by factors such as oceanic circulation, variations in solar...

17 September 2018

Pemphigoid nodularis

Pemphigoid nodularis is a rare nodular variant of bullous pemphigoid.

6 October 2018

Dermatopathology topics

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Eruptive xanthoma

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

22 September 2018

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Juvenile xanthogranuloma

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

29 September 2018

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Verrucous haemangioma

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

29 September 2018

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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).

22 September 2018

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Systemic amyloidosis

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

22 September 2018

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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...

22 September 2018

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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...

22 September 2018

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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...

25 September 2018

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Splenosis

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

25 September 2018

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Treated melanoma

New therapies targeting BRAF and MEK have emerged as the key component for the treatment of BRAF-mutant metastatic melanoma.

25 September 2018

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Angiomatoid fibrous histiocytoma

Angiomatoid fibrous histiocytoma is an uncommon variant of fibrohistiocytic tumor with intermediate malignant potential (metastases are rare but do occur).

25 September 2018

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Epithelioid haemangioma

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

17 July 2018

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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...

17 July 2018

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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...

17 July 2018

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Chickenpox

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

20 June 2018

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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...

20 June 2018

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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...

10 September 2018

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Gnathostomiasis

Human gnathostomiasis presents as larva migrans profundus, and is caused by ingesting gnathostoma larvae.

21 August 2018

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Subungual melanoma

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1 September 2018

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Lichen aureus

Lichen aureus is a distinct subtype of pigmented purpuric dermatosis.

22 September 2018

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Elastofibroma

Elastofibroma usually presents on the back (usually in the subscapular region) as a poorly defined mass or pseudotumour.

21 August 2018

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Intralymphatic histiocytosis

Intralymphatic histiocytosis manifests as quite non-descript erythematous patches or plaques. Autoimmune disease, malignancy, joint replacements, and rosacea appear to be aetiologic...

22 September 2018

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Panfolliculoma

Panfolliculoma is a benign neoplasm of follicular differentiation that was initially described by Ackerman et al.

10 September 2018

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Glomangioma

Glomangiomas (also called glomuvenous malformation) differ clinically from glomus tumors in that they occur in childhood and adolescence, are usually asymptomatic,...

11 September 2018

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Combined cellular blue naevus and trichoepitheliom

Combined trichoepithelioma and cellular blue naevus is a rare lesion that may mimic melanoma clinically.Histology of combined trichoepithelioma and cellular blue...

10 September 2018

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Cutaneous plasmacytosis

Cutaneous plasmacytosis presents with multiple reddish brown nodules.

11 September 2018

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Pseudocarcinomatous hyperplasia in anaplastic larg

Pseudocarcinomatous hyperplasia can occasionally be observed in biopsies of CD30-positive lymphoproliferative disorders.

17 September 2018

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Lymphangioma circumscriptum

Lymphangioma circumscriptum presents on the skin surface as grapelike groups of thin-walled, translucent, lymph-filled vesicles, often compared with frog...

10 September 2018

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Mycosis fungoides

IntroductionMycosis fungoides is the most common form of cutaneous T cell lymphoma. It is characterised by infiltrates of lymphocytes. It has an...

11 September 2018


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

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