Dermatology

This pruritic rash developed in a 43-year-old woman who had undergone a lumpectomy and lymph node dissection for breast cancer. She completed radiation therapy and chemotherapy 3 weeks ago. The rash has been present for 5 days. Levofloxacin was started 1 day ago.

For the past month, a 39-year-old woman has had a persistent asymptomatic rash on her face. She is otherwise healthy and takes no medications.

For a few months, a 51-year-old woman has had an asymptomatic rash on her proximal thighs. She claims to have no other rashes and denies any exposure history.

The mother of a 10-year-old boy brings him for evaluation of a persistent rash on his shins of a few months’ duration. The rash has not responded to topical corticosteroids.

For the past year, a 15-year-old boy has had a pruritic eruption on his shins. His mother suspects that his soccer shin guards are the cause; however, he wears them over his socks. Topical corticosteroids have not been effective.

A 76-year-old woman presents for evaluation of a long-standing sore just inside her lower lip. She has been referred by her dentist.

A 17-year-old boy presents with an intermittent asymptomatic rash on his cheeks that he says started 1 year earlier after a trip to Arizona over spring break. He is otherwise healthy, takes no medications, and has no other rashes.

For several weeks, a 25-year-old man has been bothered by a pruritic rash on his hands. He has a history of allergies but is otherwise healthy. He owns 2 dogs.

For 1 month, a 54-year-old woman has had an intensely pruritic eruption on her abdomen, arms, and anterior thighs. She has long-standing hypertension and type 2 diabetes mellitus, which are treated with an angiotensin-converting enzyme inhibitor/diuretic and an oral hypoglycemic agent.

This worsening rash developed after a 40-year-old man was treated with amoxicillin for an upper respiratory tract infection. When the rash started, the amoxicillin was discontinued and azithromycin was prescribed; however, the rash has persisted. The patient has no history of allergies or rashes. He takes no other medications.