title: Prognostic factors in 2230 Korean colorectal cancer patients: analysis of consecutively operated cases.
abstract: To define the prognostic factors in Korean colorectal cancer patients, univariate and multivariate analysis were performed on data from 2230 consecutive patients who underwent resection for colorectal cancer at the Seoul National University Hospital. The prognostic variables used for the analysis included patient's age, gender, bowel obstruction, bleeding, symptom duration, preoperative leukocyte count, preoperative serum carcinoembryonic antigen (CEA) level, Dukes' stage, tumor location, tumor size, depth of bowel wall invasion, number of lymph node metastases, histologic differentiation, and gross morphology of tumor. The overall 5-year survival rate was 62%. In the univariate analysis, all the factors except sex, symptom duration, and tumor size were associated with prognosis. Among the factors significant in the univariate analysis, Dukes' stage (p < 0.001), number of lymph node metastasis (p < 0.001), CEA level (p < 0.001), tumor location (p = 0.003), gross morphology of tumor (p = 0.017), and depth of bowel wall invasion (p = 0.031) were significant in the multivariate analysis. Several differences in prognostic factors between colon cancer and rectal cancer were observed. In the multivariate analysis, gross tumor morphology was significant only for colon cancer, and histologic differentiation was significant only for rectal cancer. Lymph node metastasis was an independent prognostic variable for both colon and rectal cancer, but its significance was more prominent for rectal cancer. Although Dukes' stage is the most reliable prognostic predictor, this study shows that other factors (preoperative CEA level, gross morphology of tumor, location of tumor, nodal status) also provide important information for the outcome of the patient.
authors.affiliation: Department of Surgery, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-744, Korea.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Park
authors.forename: K J
authors.initials: KJ
authors.lastname: Park
authors.forename: J G
authors.initials: JG
authors.lastname: Park
authors.forename: K U
authors.initials: KU
authors.lastname: Lee
authors.forename: K J
authors.initials: KJ
authors.lastname: Choe
authors.forename: J P
authors.initials: JP
authors.lastname: Kim
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D002272:Carcinoembryonic Antigen / Q000097:blood; D003110:Colonic Neoplasms / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000601:surgery; D006801:Humans; D007415:Intestinal Obstruction / Q000601:surgery; D007723:Korea; D007958:Leukocyte Count; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011379:Prognosis; D012004:Rectal Neoplasms / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012737:Sex Factors; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D002272:Carcinoembryonic Antigen