Derm Dx: Linear dermatosis that follows the lines of Blaschko

A 3-year-old Hispanic male is brought in by his mother for evaluation of scattered papules on his abdomen, which had previously been diagnosed clinically as insect bites. His mother also points out a rash on the child's right leg that has been present for approximately 4 weeks. She observes him scratching the site periodically. Examination reveals linear bands of slightly ...