This gentleman presented with recent colour change in his thumb nail
King-man Ho ???

Readers are invited to participate in the Clinical Quiz. 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 24 May 2013. Each reader is allowed to submit one entry only. The name of the winner and the answer will be published in the June 2013 issue.

Clinical history:
This gentleman presented with recent colour change in his thumb nail.

Answer:
B. Nail psoriasis

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The slide and the question were prepared by:

Dr King-man Ho, ^{FRCP (Glasg, Edin), MRCP (UK), FHKCP, FHKAM (Medicine)}
Consultant Dermatologist-in-Charge,
Social Hygiene Service, PHSB, CHP, DH