Clinical Quiz
The Hong Kong Practitioner VOLUME 28 / May 2006

A man presenting with an itchy rash over his back
Kuen-kong Lo ¿c°®­è


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 23 June, 2006. 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 59-year old business man complained of a localized persistent itchy rash affecting his lower back for the past four years. The patches were persistent and never disappeared. The itch was constant with some temporary relief with topical application of steroid cream. Skin scrapings from the lesions for microscopic and mycology studies were all negative. His past health was good. Apart from the creams for relieving of pruritus, he had not used other topical preparations over the affected areas. On examination, there was no abnormality of touch or pain sensation in the patches.
The slide and the question were prepared by:
Dr Kuen-kong Lo, FRCP (Edin, Glas), FHKCP, FHKAM(Med)
Consultant Dermatologist-in-Charge,
Social Hygiene Service, PHSB, CHP, DH.

What is the diagnosis?

A. Cutaneous B cell lymphoma
B. Hansen's disease
C. Cutaneous T cell lymphoma
D. Tinea corporis

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