The patient is an 8 yo girl with a congenital lesion on the left arm. She was seen for another reason. There are no other significant skin lesions and the child is normal in all respects.O/E: 3.5 cm diameter hypopigmented macule with irregular border,Diagnosis: This is probably a nevus depigmentosis. Nevus anemicus is less likely as is ash leaf macule of tuberous sclerosis. (I did not do dermoscopy of this lesion, but...
