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Biochemical recurrence after radical prostatectomy: multiplicative interaction between surgical margin status and
Lars Budäus1, Hendrik Isbarn, Christian Eichelberg
1Martiniclinic, Prostate Cancer Center Hamburg-Eppendorf, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
The Journal of Urology
|August 21, 2010
Summary
Positive surgical margins after radical prostatectomy significantly increase biochemical recurrence risk, especially in higher pathological stages (pT3a/b). This interaction worsens prognosis beyond the initial disease stage.
Area of Science:
- Urology
- Oncology
- Surgical Pathology
Background:
- Positive surgical margins after radical prostatectomy are linked to adverse prognosis.
- Limited research exists on the interaction between margin status and pathological stage.
Purpose of the Study:
- To investigate the interaction between positive surgical margins and pathological stage in predicting biochemical recurrence after radical prostatectomy.
Main Methods:
- Univariate and multivariate analyses were performed on 4,490 patients.
- Tested interactions between surgical margin status and pretreatment PSA, pT/pN stage, and Gleason sum.
- Quantified effects on biochemical recurrence rates if interactions were significant.
Main Results:
- 18.9% of patients had positive surgical margins.
- Positive margins significantly reduced 5-year recurrence-free survival across pT2, pT3a, and pT3b stages.
- The pT stage-surgical margin status interaction was an independent predictor (p=0.003).
Conclusions:
- Positive surgical margins increase 5-year biochemical recurrence rates by 12-18% compared to negative margins.
- Positive margins substantially worsen prognosis, independent of the initial pathological stage.
