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Related Experiment Videos

Prostate specific antigen after irradiation for prostatic carcinoma.

I Kaplan1, B R Prestidge, R S Cox

  • 1Department of Radiation Oncology, Stanford University School of Medicine, California.

The Journal of Urology
|November 1, 1990
PubMed
Summary

Monitoring serum prostate specific antigen (PSA) after prostate cancer radiation therapy can identify patients at high risk for recurrence. Serial PSA levels help predict treatment failure early.

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Area of Science:

  • Oncology
  • Urology
  • Radiotherapy

Background:

  • The clinical role of serum prostate specific antigen (PSA) post-radiation for prostate adenocarcinoma remains unclear.
  • Prostate cancer treatment response and recurrence monitoring are critical for patient outcomes.

Purpose of the Study:

  • To evaluate the significance of serial serum PSA levels in predicting treatment failure after primary irradiation for prostate cancer.
  • To determine if PSA trends can identify patients at risk for distant metastases.

Main Methods:

  • A cohort of 43 patients with adenocarcinoma of the prostate underwent serial PSA measurements before and after definitive radiation therapy.
  • Patients were staged (T0d, T1, T2, T3) and categorized into high, intermediate, or low risk groups based on PSA values and trends.

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  • Recurrence rates were analyzed in relation to PSA risk stratification.

    • Main Results:

    • All patients showed an initial decrease in PSA post-treatment.
    • Rising PSA levels preceded clinical recurrence by 2-7 months in patients with metastatic disease.
    • Recurrence rates were significantly higher in high-risk (44%) and intermediate-risk (33%) groups compared to the low-risk (0%) group (p=0.0025).

    Conclusions:

    • Serial post-irradiation PSA monitoring is valuable for early detection of treatment failure in prostate cancer patients.
    • PSA kinetics can effectively stratify patients based on their risk of developing distant metastases.
    • This approach aids in timely clinical intervention for high-risk individuals.