Dermatologic Look-Alikes Articles

Purple eruptions

Noah S. Scheinfeld, MD, JD March 01, 2010

Two patients with purple lesions and no other abnormal skin findings.
 

Erythematous truncal plaques

Sean D. Doherty, MD February 04, 2010

Two patients with erythematous trunk plaques—the first developed eight months earlier, and the other 15 years ago.
 

Vesiculobullous eruptions

Stanley Chan, MD January 08, 2010

Two patients present with similar vesiculobullous eruptions. One was preceded by painful mouth sores, the other had no oral involvement.
 

Reminders of sun exposure

Laura Conley and Robert L. Buka, MD December 15, 2009

Sun exposure is the common link between these two conditions. Can you tell them apart?
 

Can you identify these similar scalp nodules?

Deborah J. Yang, MD December 01, 2009

Two women present with growing scalp nodules. One patient reported recent unintentional weight loss.
 

Coalescing purpuric plaques

Noah S. Scheinfeld, MD, JD November 10, 2009

Can you distinguish between two purpuric plaques on patients' legs?
 

A pair of generalized red rashes

Noah S. Scheinfeld, MD, JD November 03, 2009

Two men present with red rashes—one started on the back and spread to the upper arms, and the other was limited to the chest.
 

Facial plaques in aging men

Noah S. Scheinfeld, MD, JD October 05, 2009

Two aging men develop similar-appearing asymptomatic facial plaques.
 

Discrete areas of hair loss

Noah S. Scheinfeld, MD, JD September 28, 2009

A 40-year-old woman and a 3-year-old boy experience similar patterns of hair loss—one of sudden onset and the other present at birth.
 

Axillary papules and plaques

Noah S. Scheinfeld, MD, JD September 03, 2009

Differentiating two similar-appearing cases of axillary papules and plaques
 

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