Clinical Quiz
The Hong Kong Practitioner VOLUME 23 / October 2001

A woman with tender leg nodules

L Y Chong 莊禮賢

A monthly clinical quiz is published in The Hong Kong Practitioner. Readers are invited to participate and a prize draw, sponsored by Pfizer Corporation, 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 October 30, 2001. Each reader is allowed to submit one entry only. The name of the winner and the answer will be published in the November issue.

Clinical history:
This 70 years old woman presented with a two year history of mildly tender erythematous indurated plaques and nodules on both legs. The right calf was more extensively involved than the left side. There was a history of ulceration of the left leg that subsequently healed with scar formation. Past health was unremarkable.

What is the most likely diagnosis?

A. Erythema nodosum
B. Erythema induratum
C. Erythema elevatum diutinum
D. Atypical mycobacterial infection

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The slide and the question were prepared by:
Dr L Y Chong, FHKAM(Med), FRCP(Lond, Edin, Glasg)
Consultant Dermatologist,
Yaumatei Dermatology Clinic, Social Hygiene Service, Department of Health, 12/F, Yaumatei Specialist Clinic, 143 Battery Street, Kowloon, Hong Kong.