Relative contribution of digital rectal examination and transrectal ultrasonography in interpreting serum prostate-specific antigen values for screening prostate cancer in Arab men
oleh: Sheikh Mehraj, Sinan Tariq, Kehinde Elijah, Hussein Ali, Anim Jehoram, Al-Hunayan Adel
| Format: | Article |
|---|---|
| Diterbitkan: | King Faisal Specialist Hospital and Research Centre 2007-01-01 |
Deskripsi
<b>Background: </b> This study was conducted to determine the utility of digital rectal examination (DRE), transrec-tal ultrasonography (TRUS) and serum prostate-specific antigen (PSA) in the diagnosis of prostate cancer in men in Arabia, an area of the world with a relatively low incidence of this disease. <b>Patients and Methods: </b> 329 patients suspected of having prostate cancer on account of raised serum PSA level (> 4 ng/ml), DRE or TRUS findings, underwent TRUS-guided prostate biopsy. Raised PSA individually as well as combined, or a lesion suspicious of carcinoma on DRE or TRUS was recorded as PSA (+), DRE (+) or TRUS (+), respectively. The contribution of DRE, TRUS and serum PSA to the diagnosis of prostate cancer was analysed. <b>Results: </b>Of the 329 patients who had prostate biopsies 109 cases (33.1%) had PCa. Of these 109 patients 56 (51 %) had DRE (+), 77 (42%) had TRUS (+) and 49 ( 66%) had both DRE (+) and TRUS (+). Statistical analysis revealed that DRE (+) tripled the probability for cancer. PSA over a range of 10-50 ng/mL demonstrated an in-creasing cancer probability ranging from 2 to 3 fold. TRUS (+) was only significantly associated with cancer risk if PSA was elevated. The presence of all three factors increased the cancer probability by 6 to 7 fold. <b> Conclusion: </b> TRUS findings are dependent on PSA for interpretation while DRE (+) with elevated PSA makes PCa more likely.