Bathing trunks nevus: case report of giant congenital melanocytic nevus.

Bathing trunks nevi, a subtype of giant congenital melanocytic nevi (CMN), are skin tumors that present by 2 years of age and occur in a low percentage of all births. We report a case of bathing trunks nevus that was initially suspected to be melanoma, and describe the history, pathophysiology, and treatment options for CMN. We also discuss the risk for neurocutaneous melanosis (NCM), which is a rare syndrome in patients with giant CMN.