title: Evaluation of Ca 12-5 as a tumor marker for gastric and colo-rectal cancer in comparison to CEA and Ca 19-9.
abstract: We performed simultaneous measurements of CA 12-5, CEA and Ca 19-9 in the preoperative sera of 87 patients with gastric cancer, 177 patients with colo-rectal cancer and 55 patients with benign diseases. 5.6% of the control patients, 13.8% of the gastric cancer patients and 9.6% of the colo-rectal cancer patients showed Ca 12-5 values of 27.0 U/ml and more. In contrast, the sensitivity of the tumor markers CEA (greater than or equal to 5.0 ng/ml in 17.1% of the gastric cancer and 36.2% of the colo-rectal cancer patients examined) and Ca 19-9 (greater than or equal to 25.0 U/ml in 16.1% of the gastric cancer and 19.8% of the colo-rectal cancer patients) was distinctly higher. The simultaneous determination of three markers on the one hand increased the rate of 'marker-positive' patients (up to 34.5% in gastric cancer and 45.2% in colo-rectal cancer) but on the other hand diminished the specificity (from 96.4% to 89.1%) of the examination.
authors.forename: A
authors.initials: A
authors.lastname: Quentmeier
authors.forename: P
authors.initials: P
authors.lastname: Schlag
authors.forename: H P
authors.initials: HP
authors.lastname: Geisen
authors.forename: H
authors.initials: H
authors.lastname: Schmidt-Gayk
mesh_terms: D000951:Antigens, Neoplasm / Q000032:analysis*; D015295:Antigens, Tumor-Associated, Carbohydrate; D002272:Carcinoembryonic Antigen / Q000032:analysis*; D003110:Colonic Neoplasms / Q000276:immunology*; D006801:Humans; D012004:Rectal Neoplasms / Q000276:immunology*; D013274:Stomach Neoplasms / Q000276:immunology*
chemical_list: D000951:Antigens, Neoplasm; D015295:Antigens, Tumor-Associated, Carbohydrate; D002272:Carcinoembryonic Antigen