title: Clinicopathological characteristics and prognosis of schistosomal colorectal cancer.
abstract: OBJECTIVE
  The aim of the present study was to investigate the clinicopathological characteristics and prognostic factors of schistosomal colorectal cancer.
  
  
  METHODS
  A total of 74 consecutive schistosomal colorectal cancer patients who underwent curative surgery from July 2009 to July 2012 were included in this study. The clinical and pathological characteristics of all 74 patients were analysed and univariate and multivariate analyses were performed. This study demonstrated positive correlations between the site of deposition of schistosomal eggs and certain essential variables.
  
  
  RESULTS
  Depositional site of schistosome eggs, carcinoembryonic antigen (CEA) level and the pathological N and T stages were statistically significantly correlated with overall survival (OS). The pathological T stage and the CEA level were independent prognostic factors for OS. The site of deposition of schistosome eggs was positively correlated with the T and N stages, tumour size, the CEA level and the resection margins.
  
  
  CONCLUSIONS
  Schistosome eggs might be associated with tumorigenesis. The site of deposition of schistosome eggs was statistically significantly correlated with OS but it was not an independent prognostic factor for OS. It was, however, correlated with the depth of the tumour. The presence of schistosoma eggs at the margin did not affect the patient's prognosis or anastomotic healing. The existing standard surgical approach was equally applicable to schistosomal colorectal cancer. It was not necessary to expand the scope of surgical resection.
authors.affiliation: Department of Gastroenterological Surgery, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.affiliation: Department of Gastroenterological Surgery, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: Q B
authors.initials: QB
authors.lastname: Wu
authors.affiliation: Department of Gastroenterological Surgery, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: W B
authors.initials: WB
authors.lastname: He
authors.affiliation: Department of Gastroenterological Surgery, West China Hospital, Sichuan University, Chengdu, China. hxwangm@126.com.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D002272:Carcinoembryonic Antigen / Q000097:blood; D003082:Colectomy; D003106:Colon / Q000469:parasitology*; D015179:Colorectal Neoplasms / Q000097:blood / Q000469:parasitology* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D011379:Prognosis; D012007:Rectum / Q000469:parasitology*; D012547:Schistosoma; D015996:Survival Rate; D047368:Tumor Burden
chemical_list: D002272:Carcinoembryonic Antigen
keywords: Schistosomiasis; clinicopathological characteristics; colorectal cancer; prognosis