Swayam P Nirujogi, MD, MBA

During the evaluation of a healthy 7-year-old boy, an asymptomatic brown “dirt-like” rash is found on the anterior neck. It has progressed over the last 2 months and does not clear with routine bathing and aggressive scrubbing by his mother with soap and water.

A 17-month-old African American girl, with no significant past medical history, is brought to the Pediatric Emergency Department with acute onset of swelling in the floor of her mouth. What's the diagnosis?