Comparative study on clinicopathologic characteristics and prognosis between young ender patients with rectal cancer / 肿瘤研究与临床

ABSTRACT

Objective To investigate the differences of clinicopathologic characteristics and prognosis between young and old age patients with rectal cancer. Methods From January 1996 to January 2006, 85 young patients(age≤40 years) and 155 older patients(age≥65 years)with rectal cancer were surgically treated. The clinicopathological and follow-up data of them were retrospectively analyzed and compared by survival analysis and COX regression multivariate analysis. Results Rectal cancer under peritoneal in young group were higher than that in older group (69.41 % vs 52.90 %, P =0.013). The young group had significantly higher frequencies of pooly differentiated carcinoma (31.76 % vs 18.71 %, P =0.023) and more mucinous adenocarcinoma as well as signet-ring cell carcinoma (22.35 % vs 8.39 %, P =0.007), There were more lymphatic metastasis in young group than that in old group (N_1+N_2: 63.53 % vs 47.10 %, P =0.015). The overall 5-year survival rates were 48.2 % and 55.7 % in young and old patients respectively, which was not significantly different (P =0.176). COX regression showed that radical operation, tumor infiltration depth,lymph node metastasis and TNM stage were independent prognostic factors. Conclusion As compared to the old age patients, more malignancy and more advanced stage are common in young patients with rectal cancer.However the efficacy of young patients is similar to the older counters by early detection and radical operation combined radiotherapy as well as chemotherapy.