For a better quality of life in rectal cancer patients, high dose radi
otherapy following abdominoperineal resection of the rectum with a pel
vic partition is another surgical option replacing extended abdominope
rineal resection. In addition to pelvic partition with polyglycolic ac
id mesh, the tissue expander was inserted into the pelvic cavity to su
pport the intestine upward and the bladder forward. The mean total rad
iation dosage was 5040 cGy. Between 1989 and 1991, 10 patients were tr
eated according to this method. Out of 10 patients 9 were free of recu
rrence, and only one had hepatic metastasis. In addition, postoperativ
ely, the average residual urine by this method was 39.1 mi and was sta
tistically different compared to a figure of 200 mi in conventional ab
dominoperineal resections (p<0.001, ''t''-test). In order to individua
lize the operative procedures among a variety of surgical options, the
molecular biological technique was utilized. In p53 stain analysis of
114 colorectal cancer patients, patients with p53 positive staining r
eached a higher stage than those with p53 negative staining (p<0.05, X
(2) analysis). Therefore, we surmised that the positivity of the p53 s
tain could be one of the factors gauged as an indication of postoperat
ive high-dose radiation. In conclusion, high-dose postoperative radiot
herapy was thought to be one of the treatment modalities to improve th
e survival and quality of life of advanced rectal cancer in selected c
ases.