Clinical Quiz
The Hong Kong Practitioner VOLUME 30 / March 2008

A lady presenting with a hairy pigmented plaque
Robin C W Su 蘇志慰


A 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. For entry into the draw, simply answer the question, fill in the reply slip and return it to the College by 30 April, 2008. Each reader is allowed to submit one entry only. The name of the winner and the answer will be published in the June issue.

Clinical history:

A 20-year-old-lady presented with a hairy pigmented plaque on her right upper arm. The skin lesion was noticed since birth as a light brownish macule. The lesion darkened, increased gradually in size and thickness with hairs protruding from it. The skin lesion now measures 4.5 cm x 2 cm in size.
The slide and the question were prepared by:
Dr Robin C W Su,
MRCP(UK), FHKCP, FHKAM(Med)
Medical Officer,
Social Hygiene Service, PHSB, DH.

What is your diagnosis?

A. Naevus of Ota
B. Becker's Naevus
C. Congenital melanocytic naevus
D. Malignant melanoma

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