Background: Intrinsic ureteral endometriosis is rare. Early detection
and treatment is extremely important to preserve renal function. Case:
A 37-year-old woman with right flank pain was diagnosed with a polypo
id lesion at excretory urogram. The polyp was removed under ureterosco
py and was found to be endometriosis. Subsequent exploratory laparotom
y and ureterolysis failed to document other foci of endometriosis. Res
ection of the ureter was not needed. She received medroxyprogesterone
for 6 months, and a ureteral stent was left in place for 3 months post
operatively. Excretory urogram showed no obstruction 6 months postoper
atively. Conclusion: This appears to be the first reported case of ure
teral endometriosis documented initially at ureteroscopy. Prompt treat
ment may relieve symptoms and preserve renal function. Resection of th
e ureter may be avoided in some patients. (C) 1998 by The American Col
lege of Obstetricians and Gynecologists.