title: The effect of colonoscopy on tumor markers.
abstract: As preoperative elevated serum levels of carcinoembryonic antigen (CEA) and CA19.9 are markers for bad prognosis in colorectal cancer patients, it is important to decide whether preoperative total colonoscopy would make a significant change in their serum levels. CEA and CA 19.9 were evaluated in three groups of patients before and after colonoscopy. The groups comprised the following: Group A, 20 patients with colorectal cancer; Group B, 17 patients with colorectal polyp of > or = 1-cm diameter; Group C, 16 patients with no colorectal pathology. CEA serum levels were found to be significantly lower after colonoscopy in all groups. CA19.9 was found to be significantly lower after colonoscopy only in Group B; it did not reach significance in Group A and was found not to be significantly higher in Group C.
authors.affiliation: Institute of Gastroenterology, Liver Diseases, and Nutrition, Assaf Harofeh Medical Center, Zerifin, Israel.
authors.forename: E
authors.initials: E
authors.lastname: Scapa
authors.forename: E
authors.initials: E
authors.lastname: Broide
authors.forename: I
authors.initials: I
authors.lastname: Pinhasov
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood*; D018395:CA-19-9 Antigen / Q000097:blood*; D002272:Carcinoembryonic Antigen / Q000097:blood*; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000097:blood* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011446:Prospective Studies
chemical_list: D014408:Biomarkers, Tumor; D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen