A 24-year-old woman presents to the clinic with a 4-month history of an erythematous annular lesion on the dorsal arm. The lesion is neither painful nor pruritic, and the patient reports no associated ...

Diffuse erythematous papules A 3-year-old boy and 45-year-old man present separately to the dermatology clinic with similar looking erythematous rashes. Can you differentiate between the two? A boy ...

A 42-year-old man with a history of Crohn disease presented to the gastroenterology clinic to establish care. He reported that he was diagnosed with Crohn disease via colonoscopy 8 years ago, preceded ...

Bullous, erosive oral mucositis with areas having lichenoid features are visible on the tongue and the upper and lower lips (Panel A) and inside the right cheek (Panel B). The patient's entire body, ...

Most red or hyperpigmented lesions in the mouth are inconsequential. However, cancer and some systemic diseases may present in this way. Most red lesions are inflammatory or atrophic but ...

A 24-year-old male college student with long-standing Crohn's enterocolitis and associated recurrent perianal abscesses acutely presented with cough, fever, and intermittent hemoptysis. Four months ...

A 38-year-old man with Fitzpatrick type V skin presented to the emergency department with a 2-week history of fever, productive cough, rhinorrhea and 5 days of oral pain. He was otherwise healthy and ...

A 63-year-old woman presented with a two-month history of intermittent epistaxis. In addition, she reported a sensation of fullness and progressive hearing loss in her left ear over the previous two ...