large congenital melanocytic nevus

info · Skin

A skin disease characterized by the presence at birth of a pigmented skin lesion composed of melanocytes of more than 20 cm in projected adult diameter that has_material_basis_in somatic mutation in the NRAS gene on chromosome 11p15.5.

Signs and symptoms

Congenital giant melanocytic nevus
Long philtrum
Prominence of the premaxilla
Deep philtrum
Everted lower lip vermilion
Anteverted nares
Full cheeks
Open mouth
Nevus spilus
Short nose

Also known as: Congenital pigmented nevus; GMN; Giant congenital melanocytic nevus; Giant pigmented hairy nevus; LCMN