Clinical Quiz
The Hong Kong Practitioner VOLUME 27 / July 2005

A man presenting with an itchy rash on his chest
Tak-Shing Au °Ï¼w¦¨


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 16 August, 2005. Each reader is allowed to submit one entry only. The name of the winner and the answer will be published in the August issue.

Clinical history:

A 40-year old man complains of an itchy rash on his upper chest for 3 weeks. The lesion is getting bigger and bigger. He keeps a dog at home.
The slide and the question were prepared by:
Dr Tak-Shing Au, FRCP, FHKAM(Med)
The Hong Kong Dermatology Centre, Unit 502, Hing Wai Building, 36 Queen's Road Central, Hong Kong.

What is the most likely diagnosis?

A. Arthropod bite reaction
B. Tinea corporis
C. Erythema multiforme
D. Discoid eczema

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