The surface texture may vary from smooth to warty, and the color varies from brown to bluish black.
Present treatment consists of surgery to remove of the nevus, with skin grafting where necessary.
Extremely large nevi are removed in several stages. Except when the nevus transforms into malignant melanoma , bathing trunk nevi are compatible with a normal life span. On rare occasion, bathing trunk nevi are associated with a condition called leptomeningeal melanocytosis, which can produce hydrocephalus , retardation, motor abnormalities, and seizures . Bathing trunk nevi can transform to become malignant melanoma . The information provided herein should not be used for diagnosis or treatment of any medical condition.