White papules and 
follicular abnormalities on a toddler's face

A 4-year-old male brought in by his mother presents with multiple white papules on his face and extremities. The patient also displays hypotrichosis of the scalp and several small dimples, which resemble indentations left by an ice pick, on the dorsum of his forearms. The child's lesions have been present since birth, and his mother appears to have similar manifestations ...