Dermatologic Look-A-Likes

Cutaneous lesions

Damola A. Adegbenro, MD, and Noah S. Scheinfeld, MD, JD September 02, 2010

Two patients present with similar cutaneous growths—one a series of ulcerative lesions on the lower leg, and the other a painless forearm lesion.
 

Patches of hair loss

Sean D. Doherty, MD August 04, 2010

Two boys present with similar hair loss—one developed only months earlier, the other had been present since birth.
 

Enlarging back and shoulder lesions

Stanley Chan, MD June 29, 2010

Two patients with enlarging lesions—one in a man with no history of skin cancer, and the other in a man with significant actinic damage.
 

A pair of patients with purple lesions

Noah S. Scheinfeld, MD, JD June 08, 2010

Differing purple eruptions in two patients: one presents with a dimpled papule on the leg and the second with a pruritic, polished lesion on the penile shaft.
 

Diagnosing two distinct red rashes

By Rachel Callenback and Noah S. Scheinfeld, MD, JD May 27, 2010

In our first patient, a leg rash developed after starting cefazolin. Our second patient presented with reddish papules and plaques on the legs. Skin biopsy confirmed hemosiderin deposits in the upper dermis. What's your diagnosis?
 

Hypopigmented patches on the body

Sean D. Doherty, MD April 21, 2010

Two young girls presented with hypopigmented patches—one on the right buttock, the other on the knees, fingers, and ankles.
 

Erythematous truncal plaques

Sean D. Doherty, MD March 02, 2010

Can you distinguish between similar plaques? Our dermatologic look-alike may stump you.
 

Similar scalp nodules in two female patients

Deborah J. Yang, MD February 02, 2010

Two women present with growing scalp nodules. One patient had a nodule that was increasing in size, though not pruritic or painful. The other patient reported unintentional weight loss....
 

Reminders of sun exposure

Laura Conley and Robert L. Buka, MD January 07, 2010

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

A pair of generalized red rashes

Noah S. Scheinfeld, MD, JD December 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.
 
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