Ureteral endometriosis in a female patient presenting with single-kidney anuria

Endometriosis affecting the urinary tract is very rare. We report on a female patient with a single kidney who presented with anuria due to ureteral endometriosis. Initially a limited ureterectomy with an end-to-end anastomosis was performed. After removing the stent, endometriosis recurred. On reexploration, the terminal ureter was removed and the sound end reimplanted into the urinary bladder. A salpingo-oophorectomy was performed, and danazol 400 mg twice daily was started, with very satisfactory results. Endometriosis on a single acquired ureter causing anuria has, to our knowledge, not been reported previously. The modality of treatment is local excision, oophorectomy, and danazol.