Dermatopathology

Photo Challenge

Pedunculated Tumor on the Posterior Neck

A 56-year-old man presented with a progressively enlarging lesion on the posterior neck of 8 months’ duration. He reported localized pruritus of...

Dermpath Diagnosis

Erythematous and Ulcerated Plaque on the Left Temple

A 72-year-old man with a history of nonmelanoma skin cancer and lung transplant maintained on stable doses of prednisone and tacrolimus presented...

MD IQ

Case Letter

A Severe Presentation of Plasma Cell Cheilitis

Plasma cell cheilitis (PCC) is an uncommon condition characterized by mature plasma cell infiltration of the dermis of the mucosal lip. We present...

Photo Challenge

Verrucous Scalp Plaque and Widespread Eruption

A 40-year-old man presented for evaluation of a thick verrucous plaque throughout the scalp extending onto the forehead; thick plaques on the...

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...

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