Stone formation in a urethral diverticulum is rare and may be encountered in men. We report the case of a 54-year-old woman who reported lower urinary tract symptoms and a tender periurethral mass. Clinical, radiolo- gical and endoscopic investigations confirmed the diagnosis of lithiasis in a urethral diverticulum. Transvaginal diverti- culectomy and removal of calculi were performed success- fully. To cite this journal: Pelvi-Perineologie 6 (2011).