title: [Changes of serum total PSA and free PSA in patients with prostate carcinoma and benign prostate hyperplasia].
abstract: OBJECTIVE
  Total prostate-specific antigen (TPSA) is considered the best marker in diagnosis of carcinoma of prostate (Pca), and FPSA (free prostate specific antigen)/TPSA can improve its specificity in diagnosis of PCa. This study was designed to compare the level of serum TPSA and FPSA/TPSA between PCa and benign prostate hyperplasia (BPH) patients, providing reference for diagnosis of PCa.
  
  
  METHODS
  Values of serum TPSA and FPSA of 66 BPH cases, 29 BPH with acute urinary retention (AUR) cases, 22 PCa cases were determined by enzyme linked immunosorbent assay (ELISA). The differences of serum TPSA and FPSA/TPSA of the three groups were compared and analyzed.
  
  
  RESULTS
  There were significant differences of serum TPSA concentration among the three groups (P< 0.05), when the serum TPSA in the patients with BPH, BPH and AUR, PCa were 4.1+/-1.39 microg/L, 15.5+/-3.34 microg/L, 55+/-13.5 microg/L, respectively. Serum TPSA concentration overlapped in the three groups especially in AUR group when the TPSA level in the three groups were less than 4.0 microg/L, 4.0-10.0 microg/L, and more than 10.0 microg/L. There was no significant difference between BPH group and AUR group when the FPSA/ TPSA of BPH group was 0.32+/-0.13, AUR group was 0.30+/-0.09 (P >0.05). However, there were significant differences between BPH and Pca group, between AUR and PCa group when the FPSA/TPSA of Pca group was 0.11+/-0.05 (P< 0.05). FPSA/TPSA level also overlapped in these three groups when FPSA/TPSA level was less than 0.15, 0.15-0.25, and more than 0.25.
  
  
  CONCLUSIONS
  The serum TPSA and the level of FPSA/TPSA overlapped in these three groups. They can only be regarded clinically as reference index.
authors.affiliation: Department of Urology, First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, PR China.
authors.forename: Zhong-Wei
authors.initials: ZW
authors.lastname: Gao
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.forename: Bin-Wu
authors.initials: BW
authors.lastname: Sheng
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood; D006801:Humans; D008297:Male; D008875:Middle Aged; D017430:Prostate-Specific Antigen / Q000097:blood*; D011470:Prostatic Hyperplasia / Q000097:blood*; D011471:Prostatic Neoplasms / Q000097:blood*; D016055:Urinary Retention / Q000097:blood
chemical_list: D014408:Biomarkers, Tumor; D017430:Prostate-Specific Antigen