Clinical Quiz
The Hong Kong Practitioner VOLUME 28 / November 2006

An elderly lady presenting with an ulcerated nodule
Robin C W Su 蘇志慰


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 28 December, 2006. Each reader is allowed to submit one entry only. The name of the winner and the answer will be published in the December issue.

Clinical history:

A 78-year old lady presented with a painless firm nodule on left forehead that progressively enlarged over few years, reaching one centimeter in diameter. The centre became ulcerated, with a smooth pearly edge.
The slide and the question were prepared by:
Robin C W Su, MRCP(UK), FHKCP, FHKAM(Med)
Medical Officer,
Social Hygiene Service, Public Health Service Branch, Department of Health.

What is the diagnosis?

A. Molluscum contagiosum
B. Keratoacanthoma
C. Trichoepithelioma
D. Basal cell carcinoma

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