Cystolith formation complicating single-incision sling.

Single-incision slings are the newest midurethral slings developed for the surgical treatment of stress urinary incontinence. We report the case of a patient who underwent single-incision sling placement who presented with recurrent stress incontinence 3 years after the procedure. She was found to have a 1.7-cm bladder stone that formed around the single-incision sling polypropylene barb.