Pigmentation Disorders

Photo Challenge

Streaked Discoloration on the Upper Body

An 18-year-old woman presented to our dermatology clinic with persistent diffuse discoloration on the upper body of more than 5 years’ duration....

MD IQ

Photo Challenge

Violaceous Patches on the Arm

A 55-year-old man presented with red-violet patches on the right arm and chest that had been present since birth. The patches were asymptomatic...

Case Letter

Darkening and Eruptive Nevi During Treatment With Erlotinib

Cutaneous side effects of erlotinib include acneform eruption, xerosis, paronychia, and pruritus. Clinicians should monitor patients for darkening...

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