Infectious Diseases

Photo Challenge

Erythematous Verrucous Plaque on the Hand

A 75-year-old retired farmer presented with an erythematous verrucous plaque on the dorsal aspect of the left hand of 4 years' duration....


Photo Challenge

Perianal Ulceration and Verrucous Papules

A 75-year-old woman with chronic lymphocytic leukemia undergoing ibrutinib targeted therapy presented to the emergency department with fever and...

Photo Challenge

Brown Papules on the Penis

A 32-year-old man presented to the outpatient clinic with reddish brown lesions on the penis of 5 months' duration. Dermatologic examination...

Photo Challenge

Friable Erythema and Erosions on the Mouth

A 68-year-old man with squamous cell carcinoma of the tongue presented with a sore throat and odynophagia of 4 days' duration. At the time he was...

Photo Challenge

Painless Ulcer on the Areola

A previously healthy 20-year-old Chinese man presented to our dermatology outpatient clinic with a solitary painless ulcer on the right areola of...