Clinical Quiz
The Hong Kong Practitioner VOLUME 29 / December 2007

A man presenting with a brownish cutaneous mass over his thigh
Po-tak Chan ³¯Ä_¼w


A monthly clinical quiz is published in The Hong Kong Practitioner. Readers are invited to participate and a prize draw, sponsored by Pfizer Corporation Hong Kong Limited, will be undertaken among the successful entries each month. For entry into the draw, simply answer the question, fill in the reply slip and return it to the College by 31 January, 2008. Each reader is allowed to submit one entry only. The name of the winner and the answer will be published in the March issue.

Clinical history:

A 30-year old gentleman presented with a small brownish cutaneous nodule over his right thigh for two years. It remained static in size and asymptomatic. Physical examination revealed a firm 0.6cm diameter brownish, oval cutaneous nodule. There was neither surface scaling nor tenderness. There was no punctum and protruding hair and the mass was not attached to underlying structure.

The slide and the question were prepared by:
Dr Po-tak Chan,
MRCP(UK), FHKCP, FHKAM(Med)
Medical Officer,
Social Hygiene Service, PHSB, DH.

What is your diagnosis?

A. Dermatofibroma
B. Epidermoid cyst
C. Steatocystoma
D. Junctional melanocytic nevus

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