Objective To explore the clinicopathologic characteristics in young patients with colorectal cancers（CRC）.Method Retrospective analysis were made for 136 patients age 40 years or younger who received treatment for CRC at west china hospital from Mar 2005 to Feb 2007.Results Average age of 136 cases with CRC was 32.28.32 cases among them were younger than 30 years old（23.53%）.The ratio between male and female was 1.13∶1.There were altogether 141 CRC lesions found in all the cases.Among them 132（97.06%）cases presented with a single lesson

4（2.94%）cases presented with multiple lesions.Histological types in all the lesions cases were grouped as follows:tubular adenocarinoma 102（75.00%）;papillary adenocarcinoma 2（1.47%）;mucinous carcinoma 26（19.12%）;signet ring tumors 4（2.94%）;carcinoid 2（1.47%）.The cases with confirmed stage A

B

C and D were 10（7.35%）

35（25.74%）

89（65.44%）and 2（1.47%）

respectively

according to Dukesstaging system.The cases with the progressing stages（B

C

D stages）were 126（92.65%）.Conclusion CRC in the young population is more aggressive disease

presents with later Dukesstage

and has poorer clinicopathologic characteristics.