† Epidermoid cysts are reported to be uncommon on the vulva. However, among the Igbos of Nigeria, the vulva was the most common site of such cysts in a series of specimens examined at a central laboratory. Vulval epidermoid cysts probably arise as a result of traumatic implantation during ritual circumcision.
(Arch Dermatol 112:1405-1406, 1976)
Onuigbo WIB. Vulval Epidermoid Cysts in the Igbos of Nigeria. Arch Dermatol. 1976;112(10):1405-1406. doi:10.1001/archderm.1976.01630340023006