title: Simultaneous detection of colonic epithelial cells in portal venous and peripheral blood during colorectal cancer surgery.
abstract: OBJECTIVE
  This study was designed to show, in certain patients, that colonic epithelial cells can be present in peripheral blood while absent in portal venous blood.
  
  
  METHODS
  The circulating colorectal epithelial cells were detected by a reverse transcriptase-polymerase chain reaction assay, which involved amplifying guanylyl cyclase C transcripts. Portal venous and peripheral blood samples were obtained at intervals from 58 patients undergoing colorectal cancer surgery.
  
  
  RESULTS
  Circulating colonic epithelial cells were more frequently detected in portal venous blood than in peripheral blood only before mobilization of the tumor-bearing colon segment in patients with tumors of Stage B. In five other patients, before mobilization of their tumor-bearing colon segments, and in another three patients, during the mobilization, colorectal epithelial cells were detected in peripheral blood but not in portal venous blood. These eight patients had Stage C or D tumors.
  
  
  CONCLUSIONS
  In 8 of 58 patients, colorectal epithelial cells were detected in peripheral but not in portal venous blood. Metastatic deposits in lymphatic vessels or liver might be the source of these cells.
authors.affiliation: Department of Surgery, National Taiwan University, Taipei, Taiwan, Republic of China.
authors.forename: Yu-Wen
authors.initials: YW
authors.lastname: Tien
authors.forename: Po-Huang
authors.initials: PH
authors.lastname: Lee
authors.forename: Shih-Ming
authors.initials: SM
authors.lastname: Wang
authors.forename: Su-Ming
authors.initials: SM
authors.lastname: Hsu
authors.forename: King-Jen
authors.initials: KJ
authors.lastname: Chang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003106:Colon / Q000098:blood supply / Q000503:physiopathology / Q000601:surgery; D015179:Colorectal Neoplasms / Q000097:blood* / Q000503:physiopathology / Q000601:surgery*; D004847:Epithelial Cells / Q000502:physiology*; D005260:Female; D006162:Guanylate Cyclase / Q000097:blood; D006801:Humans; D008297:Male; D008875:Middle Aged; D009360:Neoplastic Cells, Circulating; D011169:Portal Vein / Q000503:physiopathology*; D000074261:Receptors, Enterotoxin; D050705:Receptors, Guanylate Cyclase-Coupled; D018000:Receptors, Peptide / Q000097:blood; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012680:Sensitivity and Specificity; D013152:Splanchnic Circulation / Q000502:physiology; D013997:Time Factors
chemical_list: D018000:Receptors, Peptide; D006162:Guanylate Cyclase; D000074261:Receptors, Enterotoxin; D050705:Receptors, Guanylate Cyclase-Coupled