Bathing Trunk Nevus

A premalignant congenital melanocytic nevus, which measures > 5 cm in greatest dimension, and has a ‘garment-like’ distribution—bathing trunk, cap, coat sleeve, stocking—often with scattered satellite lesions; up to 12% develop melanoma; leptomeningeal involvement may be accompanied by epilepsy and mental retardation

Histologic pattern Compound and intradermal nevus, neural nevus, and blue nevus