Patients undergoing uterosigmoidostomy (USS) have a high risk of devel
oping colon cancer; while no evidence of an increased risk associated
with rectal bladder (RB) has been reported The purpose of the present
study was to monitor the presence of aneuploidy by flow cytometry in p
atients who have undergone USS and RE as a possible basis for the iden
tification of patients with an ina eased risk of malignant tumour occu
rrence. We have observed that 31% of USS and 27% of RB cases were aneu
ploid. Data from the present investigation confirm that follow rip stu
dies may be useful in patients after urinary diversion.