title: [Clinical features of colorectal mucinous adenocarcinoma].
abstract: OBJECTIVE
  To investigate the clinicopathological characteristics and prognosis of colorectal mucinous adenocarcinoma (MAC) and non-mucinous adenocarcinoma (NMAC).
  
  
  METHODS
  Clinical data of 2089 cases with colorectal cancer from 1994 to 2007 in our hospital, including 169 patients diagnosed as mucinous adenocarcinoma were analyzed retrospectively.
  
  
  RESULTS
  As compared to NMAC, the tumor diameter of MAC was longer[(5.52+/-3.56) cm vs (4.62+/-2.68) cm, P<0.01]; the age of MAC was younger [(52.3+/-16.5) vs (58.7+/-13.6) years, P<0.01]. The rates of tumor location in colon (97 cases,57.4% vs 814 cases, 44.3%, in MAC and NMAC) were significantly different (P<0.01). Compared with NMAC, MAC had more lymph node involvement (103 cases, 60.9% vs 929 cases, 50.1%), more often in serosa infiltration (116 cases, 68.7% vs 914 cases, 49.8%), more peritoneal dissemination (26 cases, 15.4% vs 125 cases, 6.8%), and adjacent organ invasion (44 cases, 26.0% vs 300 cases, 16.3%) (P<0.01). The rate of radical resection (86.4% vs 91.5%), hepatic metastasis (5.3% vs 8.5%) and local recurrence had no significant difference between patients with mucinous and non-mucinous adenocarcinoma (P>0.05). In comparison to NMAC patients, MAC patients were worse in long-term overall survival, the survival of receiving radical resection and of TNM stage (II+III) group (P<0.01). Survivals were not significantly different in TNM stage I and IV groups between mucinous and non-mucinous adenocarcinoma (P>0.05).
  
  
  CONCLUSIONS
  Colorectal mucinous adenocarcinoma patients have worse outcome in comparison to non-mucinous adenocarcinoma patients. Mucinous adenocarcinoma may have special biological behavior, which is an independent prognostic factor for patients with colorectal cancer.
authors.affiliation: Department of Gastrointestinopancreatic Surgery, The First Affiliated Hospital, Sun Yet-sen University, Guangzhou, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Song
authors.forename: Yu-long
authors.initials: YL
authors.lastname: He
authors.forename: Shi-rong
authors.initials: SR
authors.lastname: Cai
authors.forename: Chang-hua
authors.initials: CH
authors.lastname: Zhang
authors.forename: Chuang-qi
authors.initials: CQ
authors.lastname: Chen
authors.forename: Jian-jun
authors.initials: JJ
authors.lastname: Peng
authors.forename: Wen-hua
authors.initials: WH
authors.lastname: Zhan
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000175:diagnosis / Q000473:pathology*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D055815:Young Adult