The diagnosis of Bourneville Tuberous Sclerosisthe „ forme frusteâ€Â- was established for a sixteen years old teen-ager, due to some typical cutaneous lesions, of angiofibromas type, wich appeared at puberty, lesions suggestive for the diagnosis. The imagery investigations confirmed the existence of the brain hamartomas and of the angiomyolipomas of the kidneys, supporting the diagnosis of Bourneville disease.