title: Are elevated levels of the tumour marker CA19-9 of any clinical significance?--an evaluation.
abstract: CA 19-9 is a tumour marker which has been used widely in patients with pancreatic adenocarcinoma. Elevated levels are associated with advanced disease at presentation and disease progression during follow-up. CA19-9 levels may also be elevated in a variety of other malignant and benign conditions. This study examined the significance and implications of elevated CA19-9 levels. An analysis of all CA19-9 measurements performed over a 4 yr period was undertaken and 204 patients with elevated CA19-9 levels were identified. One hundred and thirty patients (63.7 per cent) had malignant conditions and 74 (36.3 per cent) had benign conditions or no definite cause was found. There was a significant correlation between CA19-9 levels and CEA (r = 0.3137; P < 0.001) as well as alkaline phosphatase, ALT, AST, bilirubin, gamma glutamyl transpeptidase and lactate dehydrogenase. CA19-9 levels were significantly lower in patients with benign pathology than those with malignant pathology. Similar differences were observed for CEA. CA19-9 levels were in fact highest in patients with pancreatic carcinoma (P < 0.05) while no significant differences were observed for CEA. In conclusion CA19-9 may be elevated in both benign as well as malignant conditions and interpretation of CA19-9 results must be made in light of the clinical condition of the patient.
authors.affiliation: Department of General Surgery, University College Hospital, Galway.
authors.forename: R
authors.initials: R
authors.lastname: McLaughlin
authors.forename: D
authors.initials: D
authors.lastname: O'Hanlon
authors.forename: M
authors.initials: M
authors.lastname: Kerin
authors.forename: P
authors.initials: P
authors.lastname: Kenny
authors.forename: H
authors.initials: H
authors.lastname: Grimes
authors.forename: H F
authors.initials: HF
authors.lastname: Given
mesh_terms: D000230:Adenocarcinoma / Q000097:blood / Q000175:diagnosis*; D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood*; D018395:CA-19-9 Antigen / Q000097:blood*; D003937:Diagnosis, Differential; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000097:blood / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000097:blood / Q000175:diagnosis*; D012189:Retrospective Studies; D012680:Sensitivity and Specificity
chemical_list: D014408:Biomarkers, Tumor; D018395:CA-19-9 Antigen