A 14 year old boy came to opd with hypopigmented skin patches over forehead and white forelock. The most likely diagnosis is:
Piebaldism is defect in the migration of melanocytes form neural crest. It presents with localized white patches and areas of normal skin can also be seen within the white patches. White Forelock can also be seen.
Albinism
Nevus anemicus
Nevus achromicus
Piebaldism