Can You Diagnose This Condition?

What is your diagnosis of the condition shown in the photo on the left?

This condition manifests as asymptomatic, well-defined lesions with distribution most common on the legs and thighs. Many of these lesions have a bull’s-eye appearance. Although many cases are idiopathic and self-limiting, the condition has been associated with serious underlying conditions such as tuberculosis and malignancy. Drugs such as the antimalarial chloroquine and gold compounds have also been implicated.

Which of the following is your diagnosis?

a) Erythema nodosum
b) Erythema annulare centrifugum
c) Erythema multiforme
d) Necrobiosis lipoidica diabeticorum
e) Pretibial myxedema

Editor’s note: This blog is adapted from the handbook, Skin Disease Of The Lower Extremities: A Photographic Guide, from Tracey Vlahovic, DPM, and Stephen M. Schleicher, MD. The book is available for purchase at . The e-book version is available for purchase at , and .

The answer to the last blog ( ) is d) Lichen planus of the nail.

Erinsays: May 21, 2014 at 2:12 pm

b) Erythema annulare centrifugum

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AWmssays: May 28, 2014 at 1:29 pm

b) Erythema annulare centrifugum

Did it appear in the trunk or upper extremity as well?

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