title: Tumor M2-pyruvate kinase as tumor marker in exocrine pancreatic cancer a meta-analysis.
abstract: OBJECTIVE
  Tumor M2-pyruvate kinase, a tumor-associated dimeric form of enzyme pyruvate kinase, is commonly elevated in pancreatic cancers. This meta-analysis aimed to evaluate its diagnostic utility in comparison to carbohydrate antigen 19-9 (CA19-9) in pancreatic cancer.
  
  
  METHODS
  A literature search was conducted for entries from 1951 to 2006 using PubMed, Embase, Central, and SCI Expanded databases using M2 pyruvate kinase AND pancreatic cancer/s OR tumor/s as keywords. A total of 258 references were retrieved. Of these, 118 duplicates were removed and 132 references were excluded. All studies comparing TuM2-PK with CA19-9 in pancreatic cancer were included. Full text was obtained for 8 references of 7 included studies. Diagnostic odds ratio (DOR) and 95% confidence interval (CI) was calculated from the available specificity and sensitivity for each study and were pooled to give overall DOR and 95% CI for TuM2-PK and CA19-9. Receiver operator characteristic curve was calculated to give overall specificity and sensitivity for TuM2-PK.
  
  
  RESULTS
  The diagnostic performance of TuM2-PK (DOR, 35; 95% CI, 19.7-62.3) was similar to those of CA19-9 (DOR, 44; 95% CI, 26.5-73.1). The overall specificity for TuM2-PK was 60% with corresponding sensitivity of 95%.
  
  
  CONCLUSIONS
  Efficacy of TuM2-PK as a tumor marker is similar to that of CA19-9. Further trials are needed to use it alone or in combination with CA19-9 in patients with suspected pancreatic cancer.
authors.affiliation: University Department of Surgery, Royal Free and University College Medical School, University College London, London, UK.
authors.forename: Yogesh
authors.initials: Y
authors.lastname: Kumar
authors.forename: Kurinchi
authors.initials: K
authors.lastname: Gurusamy
authors.forename: Vineet
authors.initials: V
authors.lastname: Pamecha
authors.forename: Brian R
authors.initials: BR
authors.lastname: Davidson
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis*; D018395:CA-19-9 Antigen / Q000032:analysis; D002986:Clinical Trials as Topic; D006801:Humans; D010190:Pancreatic Neoplasms / Q000175:diagnosis* / Q000201:enzymology / Q000473:pathology / Q000648:ultrastructure; D011770:Pyruvate Kinase / Q000032:analysis*; D015203:Reproducibility of Results
chemical_list: D014408:Biomarkers, Tumor; D018395:CA-19-9 Antigen; D011770:Pyruvate Kinase