title: Role of cystic fluid in diagnosis of the pancreatic cystadenoma and cystadenocarcinoma.
abstract: OBJECTIVE
  Early and accurate diagnosis of cystic neoplasm of the pancreas is difficult especially for the differentiation of benign or malignancy. In this study, we try to compare EUS-guided fine needle aspiration biopsy combined with measurement of the cyst fluid and serum levels of CEA, and CA19-9 for the preoperative diagnosis of pancreatic cystadenoma or cystadenocarcinoma.
  
  
  METHODS
  Retrospective analysis was made on the clinical data of 37 patients with pancreatic cystadenoma and 48 patients with cystadenocarcinoma from 1998 to 2005.
  
  
  RESULTS
  Carcinoembryonic antigen (CEA), and CA19-9 of the cyst fluid and serum combined with EUS-guided fine needle aspiration biopsy was made. Examination of serum CEA, and CA19-9 resulted in 21.0+/-18.0, 2.7+/-1.7 U/L and 18.7+/-17.5, 269.0+/-182.0 U/L for cystadenoma and cystadenocarcinoma respectively (P<0.05). The sensitivity of cyst fluid combined with biopsy was higher than that of a single marker. However, the sensitivity and specificity of tumor markers of cystic fluid were much higher than that of the serum (P<0.05).
  
  
  CONCLUSIONS
  EUS-guided fine needle aspiration biopsy combined with examination of cyst fluid level of CEA and CA19-9 will be a credible means for early diagnosis of pancreatic cystadenoma and cystadenocarcinoma.
authors.affiliation: Department of General Surgery, West China Hospital, Sichuan University, Chengdo, Sichuan, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Wu
authors.forename: Lu-Nan
authors.initials: LN
authors.lastname: Yan
authors.forename: Nan-Sheng
authors.initials: NS
authors.lastname: Cheng
authors.forename: Yan-Ge
authors.initials: YG
authors.lastname: Zhang
authors.forename: Chen-Guo
authors.initials: CG
authors.lastname: Ker
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044963:Biopsy, Fine-Needle; D018395:CA-19-9 Antigen / Q000032:analysis*; D002272:Carcinoembryonic Antigen / Q000032:analysis / Q000097:blood; D003536:Cystadenocarcinoma / Q000175:diagnosis*; D003537:Cystadenoma / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000097:blood / Q000175:diagnosis*; D012680:Sensitivity and Specificity
chemical_list: D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen