Significant upgrading affects a third of men diagnosed with prostate cancer: Predictive nomogram and internal validation

Felix K H Chun, Alberto Briganti, Shahrokh F. Shariat, Markus Graefen, Francesco Montorsi, Andreas Erbersdobler, Thomas Steuber, Andrea Salonia, Eike Currlin, Vincenzo Scattoni, Martin G. Friedrich, Thorsten Schlomm, Alexander Haese, Uwe Michl, Renzo Colombo, Hans Heinzer, Luc Valiquette, Patrizio Rigatti, Claus Roehrborn, Hartwig HulandPierre I. Karakiewicz

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

OBJECTIVE: To explore the rate of significant upgrading from biopsy to radical prostatectomy (RP) specimens in a contemporary cohort, and to develop a prognostic model capable of predicting the probability of significant upgrading, as previous reports indicate that up to 43% of men with low-grade prostate cancer at biopsy will be diagnosed with high-grade cancer at RP. PATIENTS AND METHODS: The study cohort comprised 4789 men (median age 63 years, range 39-82) treated with RP, with available clinical stage, prostate-specific antigen levels, biopsy and RP Gleason sum values. These variables were used as predictors in multivariate logistic regression models (LRMs) addressing the rate of significant Gleason sum upgrading, defined as a Gleason sum increase either from ≤6 to ≥7 or from 7 to ≥8 between the biopsy and RP specimens. Regression coefficients were used to develop and validate (200 bootstrap re-samples) a nomogram predicting significant biopsy Gleason sum upgrading. RESULTS: Significant biopsy Gleason sum upgrading was recorded in 1349 (28.2%) patients. In multivariate LRMs, all predictors were highly significant (all P < 0.001). The bootstrap-corrected accuracy of the nomogram predicting the probability of significant Gleason sum upgrading between biopsy and RP specimens was 75.7%. CONCLUSION: Our nomogram might prove highly useful when the possibility of a more aggressive Gleason variant could change the treatment options.

Original languageEnglish (US)
Pages (from-to)329-334
Number of pages6
JournalBJU international
Volume98
Issue number2
DOIs
StatePublished - Aug 1 2006

Keywords

  • Gleason sum
  • Nomogram
  • Prostate biopsy
  • Prostate cancer
  • Significant upgrading

ASJC Scopus subject areas

  • Urology

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    Chun, F. K. H., Briganti, A., Shariat, S. F., Graefen, M., Montorsi, F., Erbersdobler, A., Steuber, T., Salonia, A., Currlin, E., Scattoni, V., Friedrich, M. G., Schlomm, T., Haese, A., Michl, U., Colombo, R., Heinzer, H., Valiquette, L., Rigatti, P., Roehrborn, C., ... Karakiewicz, P. I. (2006). Significant upgrading affects a third of men diagnosed with prostate cancer: Predictive nomogram and internal validation. BJU international, 98(2), 329-334. https://doi.org/10.1111/j.1464-410X.2006.06262.x