title: Comparison of non-schistosomal rectosigmoid cancer and schistosomal rectosigmoid cancer.
abstract: OBJECTIVE
  To compare the clinicopathological features of patients with non-schistosomal rectosigmoid cancer and schistosomal rectosigmoid cancer.
  
  
  METHODS
  All the patients with rectosigmoid carcinoma who underwent laparoscopic radical surgical resection in the Shanghai Minimally Invasive Surgical Center at Ruijin Hospital affiliated to Shanghai Jiao-Tong University between October 2009 and October 2013 were included in this study. Twenty-six cases of colonic schistosomiasis diagnosed through colonoscopy and pathological examinations were collected. Symptoms, endoscopic findings and clinicopathological characteristics were evaluated retrospectively.
  
  
  RESULTS
  There were no significant differences between patients with and without schistosomiasis in gender, age, CEA, CA19-9, preoperative biopsy findings or postoperative pathology. Patients with rectosigmoid schistosomiasis had a significantly higher CA-125 level and a larger proportion of these patients were at an early tumor stage (P = 0.003). Various morphological characteristics of schistosomiasis combined with rectosigmoid cancer could be found by colonoscopic examination: 46% were fungating mass polyps, 23% were congestive and ulcerative polyps, 23% were cauliflower-like masses, 8% were annular masses. Only 27% of the patients were diagnosed with rectal carcinoma preoperatively after the biopsy. Computed tomography (CT) scans showed thickened intestinal walls combined with linear and tram-track calcifications in 26 patients.
  
  
  CONCLUSIONS
  Rectosigmoid carcinoma combined with schistosomiasis is associated with higher CA-125 values and early tumor stages. CA-125 and CT scans have a reasonable sensitivity for the accurate diagnosis.
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Hao
authors.initials: H
authors.lastname: Feng
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Ai-Guo
authors.initials: AG
authors.lastname: Lu
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Xue-Wei
authors.initials: XW
authors.lastname: Zhao
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Ding-Pei
authors.initials: DP
authors.lastname: Han
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Jing-Kun
authors.initials: JK
authors.lastname: Zhao
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Tobias S
authors.initials: TS
authors.lastname: Schiergens
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Serene M L
authors.initials: SM
authors.lastname: Lee
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Wen-Peng
authors.initials: WP
authors.lastname: Zhang
authors.affiliation: Hao Feng, Tobias S Schiergens, Serene ML Lee, Wolfgang E Thasler, Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich, 81377 Munich, Germany.
authors.forename: Wolfgang E
authors.initials: WE
authors.lastname: Thasler
mesh_terms: D000368:Aged; D000818:Animals; D001706:Biopsy; D018395:CA-19-9 Antigen / Q000097:blood; D002272:Carcinoembryonic Antigen / Q000097:blood; D003113:Colonoscopy; D005260:Female; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology*; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D012004:Rectal Neoplasms / Q000097:blood / Q000469:parasitology* / Q000473:pathology / Q000601:surgery; D012189:Retrospective Studies; D012547:Schistosoma / Q000302:isolation & purification*; D012811:Sigmoid Neoplasms / Q000097:blood / Q000469:parasitology* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed
chemical_list: D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen
keywords: Biomarker; Colonoscopy; Diagnosis; Rectosigmoid cancer; Schistosomiasis