Case Letter

Cutaneous Protothecosis

Cutaneous protothecosis has the potential to mimic many other skin diseases and lesions, including eczema; nonmelanoma skin cancer; or bacterial,...

Case Letter

Verrucous Carcinoma in a Wounded Military Amputee

Verrucous carcinoma is a rare, well-differentiated, locally aggressive squamous cell carcinoma that commonly occurs in sites of inflammation or...


Dermpath Diagnosis

Bullous Retiform Purpura on the Ears and Legs

A 40-year-old woman presented with a progressive painful rash on the ears and legs of 2 weeks’ duration. She described the rash as initially red...

Dermpath Diagnosis

Subcutaneous Nodule on the Chest

A healthy 45-year-old man presented to the dermatology clinic with a slow-growing subcutaneous nodule on the left chest that had been present for...

Photo Challenge

Agminated Nodules on the Scalp

A 67-year-old man presented with pink nodules on the scalp that were enlarging and increasing over the course of 2 months. He had been a heavy...

Photo Challenge

Progressive Axillary Hyperpigmentation

A 50-year-old Hispanic woman presented with asymptomatic, progressive, brown hyperpigmentation involving the axillae, neck, upper back, and...

For Residents

Dermatopathology Etiquette 101

The authors provide 10 tips in an effort to establish a code of conduct at the microscope.

Dermpath Diagnosis

Atrophic Lesions in a Pregnant Woman

A 36-year-old pregnant woman presented with painful erythematous papules on the palms and fingers of 2 months’ duration. Similar lesions developed...