Dermatologic Disorders

A 25-year-old woman with no past medical history presented to the dermatology clinic with abrupt onset of an asymptomatic, reddish, inverted-U-shaped papulosquamous skin eruption that started 3 weeks...

A 63-year-old man with hypertension was prescribed amlodipine for blood pressure control. Three days after initiating treatment, he developed an extremely pruritic rash on his back.

A 26-year-old man with no significant medical history presented to our clinic with an area of hair loss on his posterior scalp.

A 2-month-old infant presented to the clinic with diffuse small pustules and papules localized on the scalp, face, shoulders, and back.

This article is part of a series describing and differentiating dermatologic lumps and bumps. In Part 31, Leung and colleagues describe juvenile xanthogranuloma. To access previously published articles in...

This article is part of a series describing and differentiating dermatologic lumps and bumps. In Part 43, Leung and colleagues describe blue nevi. To access previously published articles in the series,...

A 17-year-old girl presented for evaluation of “hair loss” that had begun approximately 1 year prior to presentation.

This article is part of a series describing and differentiating dermatologic lumps and bumps. In Part 28, Leung and colleagues describe dermatofibroma. To access previously published articles in the series,...

A 66-year-old man presents to the clinic with a small, bright red bump on his left ring finger, which he noticed about 1 to 2 months prior to presentation.

This article is part of a series describing and differentiating dermatologic lumps and bumps. In Part 42, Leung and colleagues describe acquired melanocytic nevi. To access previously published articles in...