Nuclear medicine biliary studies have been routinely used to identify
bile leaks that occur after laparoscopic cholecystecomy. The use of a
Tc-99m mercaptoacetyltriglycine (MAG3) renal scan to diagnose a case o
f urinary leakage that occurred after a laparoscopic-assisted colectom
y is shown in this report, Laparoscopic surgery is widely used in plac
e of conventional laparotomy to minimize recovery time and discomfort
after surgery. The complication rate for laparoscopic colectomy has be
en reported as approximately 6% to 10%, In particular, ureteral leak h
as been reported in 2% of procedures. Ascites of unknown origin can be
come a diagnostic dilemma. We present a case of postoperative ascites
of unknown origin that was successfully diagnosed as urinary leakage u
sing renal scintigraphy.