Predicting bone scan positivity in non-metastatic castration-resistant prostate cancer.

Published

Journal Article

To evaluate PSA levels and kinetic cutoffs to predict positive bone scans for men with non-metastatic castration-resistant prostate cancer (CRPC) from the Shared Equal Access Regional Cancer Hospital (SEARCH) cohort.Retrospective analysis of 531 bone scans of 312 clinically CRPC patients with no known metastases at baseline treated with a variety of primary treatment types in the SEARCH database. The association of patients' demographics, pathological features, PSA levels and kinetics with risk of a positive scan was tested using generalized estimating equations.A total of 149 (28%) scans were positive. Positive scans were associated with younger age (odds ratio (OR)=0.98; P=0.014), higher Gleason scores (relative to Gleason 2-6, Gleason 3+4: OR=2.03, P=0.035; Gleason 4+3 and 8-10: OR=1.76, P=0.059), higher prescan PSA (OR=2.11; P<0.001), shorter prescan PSA doubling time (PSADT; OR=0.53; P<0.001), higher PSA velocity (OR=1.74; P<0.001) and more remote scan year (OR=0.92; P=0.004). Scan positivity was 6, 14, 29 and 57% for men with PSA<5, 5-14.9, 15-49.9 and ⩾ 50 ng ml(-1), respectively (P-trend <0.001). Men with PSADT ⩾ 15, 9-14.9, 3-8.9 and <3 months had a scan positivity of 11, 22, 34 and 47%, correspondingly (P-trend <0.001). Tables were constructed using PSA and PSADT to predict the likelihood of a positive bone scan.PSA levels and kinetics were associated with positive bone scans. We developed tables to predict the risk of positive bone scans by PSA and PSADT. Combining PSA levels and kinetics may help select patients with CRPC for bone scans.

Full Text

Duke Authors

Cited Authors

  • Moreira, DM; Howard, LE; Sourbeer, KN; Amarasekara, HS; Chow, LC; Cockrell, DC; Hanyok, BT; Pratson, CL; Aronson, WJ; Kane, CJ; Terris, MK; Amling, CL; Cooperberg, MR; Liede, A; Freedland, SJ

Published Date

  • December 2015

Published In

Volume / Issue

  • 18 / 4

Start / End Page

  • 333 - 337

PubMed ID

  • 26171882

Pubmed Central ID

  • 26171882

Electronic International Standard Serial Number (EISSN)

  • 1476-5608

International Standard Serial Number (ISSN)

  • 1365-7852

Digital Object Identifier (DOI)

  • 10.1038/pcan.2015.25

Language

  • eng