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Related Experiment Videos

[Parameters with possible influence in PSA adjusted for transition zone volume].

J Jara Rascón1, D Subirá Ríos, E Lledó Garcia

  • 1Servicio de Urología, Hospital General Universitario Gregorio Marañtón, Madrid.

Actas Urologicas Espanolas
|July 15, 2005
PubMed
Summary

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Prostate-specific antigen adjusted to transition zone (PSA-TZ) is a useful prostate cancer marker. Its accuracy is not affected by age or digital rectal exam findings but requires adjustment for total prostate volume.

Area of Science:

  • Urology
  • Oncology
  • Biomarker Research

Context:

  • Prostate cancer diagnosis relies on prostate-specific antigen (PSA) levels.
  • PSA adjusted for transition zone volume (PSA-TZ) may improve diagnostic accuracy.
  • Factors influencing PSA-TZ require evaluation for optimal clinical application.

Purpose:

  • To assess the impact of patient age, digital rectal examination (DRE) results, and total prostate volume on PSA-TZ values.
  • To determine if PSA-TZ requires adjustments based on these clinical parameters for prostate cancer detection.

Summary:

  • No significant correlation was found between age and PSA-TZ, nor were differences observed based on DRE results.
  • Prostate cancer detection using PSA-TZ showed varying specificity (24-26%) for 95% sensitivity across normal and suspicious DRE groups.

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  • PSA-TZ values necessitate modification based on total prostate volume to maintain 95% sensitivity in cancer detection, with different thresholds for prostates >40 cc and ≤40 cc.

    • Impact:

    • PSA-TZ utility as a prostate cancer predictor is independent of age and DRE findings.
    • Adjusting PSA-TZ for total prostate volume is crucial for optimizing its sensitivity and accuracy in prostate cancer diagnosis.