<prompt> Koenen tumor seen in ?NeurofibromatosisTuberous sclerosisStruge weber syndromeTuberculosis  <response>: Ans. is b i.e., Tuberous sclerosis Periungual fibromas Koenens tumors :? Present in 20 of patients of tuberous sclerosis. Develop in adult life. Small, pink, sausage-shaped growths arising from under the nail folds; may disto the nail plate. 