Tinea capitis.

THE COMPARISON Areas of alopecia with erythema and scale in a young Black boy with tinea capitis. He also had an enlarged posterior cervical lymph node (arrow) from this fungal infection. White patches of scale from tinea capitis in a young Black boy with no obvious hair loss; however, a potassium hydroxide preparation from the scale was positive for fungus. A subtle area of tinea capitis on the scalp of a Latina girl showed comma hairs.