Patch Testing on Dupilumab: Reliable or Not?

Patch testing is important to help determine a possible allergic contactant, but there is confusion about its accuracy in patients taking...

Case Letter

Leukemia Cutis Manifesting as Nonpalpable Purpura

Leukemia cutis complicates 5% to 15% of all cases of acute myeloid leukemia in adults.


Dermpath Diagnosis

Light Brown and Pink Macule on the Upper Arm

A 37-year-old woman with a history of fibrocystic breast disease and a family history of breast cancer presented with a light brown macule on the...

Photo Challenge

Disseminated Erythematous-Violet Edematous Plaques and Necrotic Nodules

A 53-year-old man presented to the emergency department with a fever and painful skin lesions of 2 days’ duration. He reported a medical history...

Photo Challenge

Blisters in a Comatose Elderly Woman

An 82-year-old woman presented to the emergency department after her daughter found her unconscious in the bathroom laying on her right side. She...

Pediatric Dermatology Consult

What is the diagnosis?

A teen girl presents with painful, draining lesions of the axillae, groin, and buttock.

Dermpath Diagnosis

Enlarging Nodule on the Back

A 43-year-old man with an unremarkable medical history presented to our clinic with an enlarging painful nodule on the upper back that was present...

Photo Challenge

Erythematous Indurated Nodule on the Forehead

A 39-year-old man presented with an enlarging asymptomatic nodule on the forehead of more than 3 years’ duration. Physical examination revealed a...