A total of 216 midstream urine (MSU) samples from 36 patients with gyn
ecological malignancies undergoing external pelvic radiotherapy (RT) w
ere studied periodically every week for any evidence of urinary tract
infection (UTI). UTI was detected in 33.3% patients of whom 8.3% had i
nfection at the onset of RT and the rest developed UTI during the cour
se of therapy. All three patients who had UTI at the onset of RT under
went cystoscopy as a part of routine pretreatment workup. A higher pre
ponderance of UTI was observed in patients of stage III carcinoma ceni
x (33.3%) compared to stage II (16.7%) during the course of RT. Half o
f the patients with UTI had repeated episodes of infection despite app
ropriate antibiotic treatment. The study emphasizes the importance of
conducting periodic MSU examination in patients with gynecological mal
ignancies during RT and its treatment with appropriate antibiotics to
minimize the risks of further injury to the already susceptible uroepi
thelium following radiotherapy. (C) 1995 Academic Press, Inc.