title: p53 protein expression and CA19.9 values in differential cytological diagnosis of pancreatic cancer complicated with chronic pancreatitis and chronic pancreatitis.
abstract: OBJECTIVE
  To evaluate p53 protein overexpression and to measure serum CA19.9 concentrations in cytological diagnosis of patients with suspected pancreatic cancer.
  
  
  METHODS
  24 patients with suspected pancreatic cancer due to chronic pancreatitis, had a pancreatic mass determined by imaging methods. The serum CA19.9 concentration was measured by solid phase radioimmunoassay. On laparotomy, puncture biopsy was performed, and specimens were divided into two parts for cytological diagnosis and detection of p53 protein.
  
  
  RESULTS
  Cytology offered a sensitivity of 0.63, a specificity of 1.00, and an accuracy of 0.63. p53 protein analysis offered a sensitivity of 0.44, a specificity of 1.00, and an accuracy of 0.73. CA19.9 offered a sensitivity of 0.44, a specificity of 0.80, and an accuracy of 0.67. The combined cytology and p53 protein analysis showed a sensitivity of 0.78, a specificity of 1.00, and an accuracy of 0.92. Cytology and CA19.9 showed a sensitivity of 0.67, a specificity of 0.80, an accuracy of 0.67. combined cytology and p53 protein analysis and CA19.9 showed a sensitivity of 0.78, a specificity of 0.80,and an accuracy of 0.79.
  
  
  CONCLUSIONS
  Superior to any single test, the combined approach is helpful for the differential diagnosis of pancreatic cancer complicated with chronic pancreatitis. The combined cytology and p53 protein analysis offers the best diagnostic efficacy.
authors.affiliation: Department of Surgery, the Second Affiliated Hospital, Medical College of Zhe Jiang University, Hang Zhou 310009, Zhe Jiang Province, China. samier-1969@163.com
authors.forename: De-Qing
authors.initials: DQ
authors.lastname: Mu
authors.forename: Guo-Feng
authors.initials: GF
authors.lastname: Wang
authors.forename: Shu-You
authors.initials: SY
authors.lastname: Peng
mesh_terms: D000328:Adult; D000368:Aged; D018395:CA-19-9 Antigen / Q000097:blood*; D002908:Chronic Disease; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000175:diagnosis* / Q000209:etiology* / Q000378:metabolism / Q000473:pathology; D010195:Pancreatitis / Q000150:complications*; D012189:Retrospective Studies; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D018395:CA-19-9 Antigen; D016159:Tumor Suppressor Protein p53