Perforation of the Urinary Bladder Caused by Transurethral Insertion of a Pencil for the Purpose of Masturbation in a 29-Year-Old Female. - Bantis, Athanasios; Sountoulides, Petros; Kalaitzis, Christos; Giannakopoulos, Stelios; Agelonidou, Eleni; Foutzitzi, Soultana; Touloupidis, Stavros (Case Reports in Medicine, 2010)