A patient presents with a large hyperpigmented patch with increased hair growth that began developing on his upper chest and neck around puberty.
An infant is brought to the dermatologist for evaluation of a red lesion on her cheek.
A man with a 15-year smoking history presents with well-demarcated erythematous plaques with scale on his ears, arms, and cheeks.
A 41-year-old man presents with a 3-year history of progressively worsening generalized erythematous, eczematous, and pruritic skin lesions along with lichenifications of the flexural surfaces.
A 29-year-old white man presents with a 10-day history of a scaly, pruritic lesion on his right posterior thigh. His medical and family histories are unremarkable. On examination, the lesion is an annular erythematous plaque with trailing scale. The polycyclic plaque has a central clearing. Biopsy is performed, the results of which show a dense…
A 10-year-old child presents for evaluation of a 5-day history of lesions on the hands. Examination reveals multiple circumscribed, hyperpigmented lesions. The lesions appeared 12 hours after the patient took oral ibuprofen for fever. Three months earlier, identical lesions appeared in the same locations after the patient took the same medication for 3 days. This…
A man presents with a mass on the back of his neck that limits his range of motion and causes discomfort.