DETECTION OF PROSTATE CANCER WITH COMPLEXED PSA AND COMPLEXED/TOTAL PSA RATIO - IS THERE ANY ADVANTAGE?

作者：Strittmatter F^*; Stieber P; Nagel D; Fuellhase C; Walther S; Stief C G; Waidelich R

来源：European Journal of Medical Research, 2011, 16(10): 445-450.

• Prostate cancer
• tPSA
• cPSA
• ratio f/tPSA
• ratio c/tPSA
• detection of prostate cancer
• benign hyperplasia of the prostate

Objective: To evaluate the performance of total PSA (tPSA), the free/total PSA ratio (f/tPSA), complexed PSA (cPSA) and the complexed/total PSA ratio (c/tPSA) in prostate cancer detection.
Methods: Frozen sera of 442 patients have been analysed for tPSA, free PSA (fPSA) and cPSA. 131 patients had prostate cancer and 311 patients benign prostatic hyperplasia.
Results: Differences in the distribution of the biomarkers were seen as follows: tPSA, cPSA and c/tPSA were significantly higher in the PC group, and f/tPSA was significantly higher in the BPH group. In the tPSA-range of 0-4 ng/ml none of the biomarkers showed a significant difference in the distribution between both groups. In the tPSA-ranges of 0-10 ng/ml, 2-10 ng/ml, 4-10 ng/ml and <10 ng/ml, f/tPSA showed the highest specificity at high sensitivtities, followed by c/tPSA, cPSA, and tPSA, respectively. In tPSA-ranges greater than 10 ng/ml, cPSA offered the best discriminatory ability. CPSA compared to tPSA offered better specificity at high sensitivities in all tPSA-ranges.
Conclusion: F/tPSA offers the best ability to distinguish between both groups in lower tPSA-ranges, followed by c/tPSA. CPSA compared to tPSA offers a better ability to discriminate between both groups in all PSA-ranges and could be used as an initial test for PC.

• 出版日期2011-10-10