An unusual cause of extra-vesical radiopaque lesion.

Introduction An 80-year-old man with a previous history of recurrent urinary tract infections presented with intermittent, painful and whole stream gross haematuria for 2 months. Physical examination was unrevealing. The result of urine cytology was negative for malignancy. Intravenous pyelography (IVP) revealed left hydronephrosis with obstruction at left ureterovesical junction, radiolucent fi lling defect within the bladder and an extra-vesical radiopaque lesion (Fig. 1). The fi nding of cystoscopy was a large, sessile, papillary lesion over the left lateral wall of the bladder. What is the diagnosis of the extra-vesical radiopaque lesion? A. Phlebolith B. Fecal material C. Bladder diverticular stone D. Ureter diverticular stone E. Artifact