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Clin Genitourin Cancer. 2019 Feb;17(1):e44-e52. doi: 10.1016/j.clgc.2018.08.007. Epub 2018 Aug 30.

Impact of Multifocality and Multilocation of Positive Surgical Margin After Radical Prostatectomy on Predicting Oncological Outcome.

Author information

1
Department of Urology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
2
Division of Urology, Department of Surgery, Geneva University Hospital, Geneva, Switzerland.
3
Department of Pathology and Urology, Peking University Third Hospital, Beijing, China.
4
Department of Urology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA. Electronic address: cwu2@partners.org.

Abstract

OBJECTIVE:

To assess the impact of focality and location of positive surgical margins (PSM) on long-term outcomes after radical prostatectomy (RP) for prostate cancer (PCa), including biochemical recurrence (BCR), metastasis and overall mortality.

PATIENTS AND METHODS:

From a total of 2796 cases of RP between 1993 and 2007 in our single hospital, 476 cases with PSMs were identified and included in this study. PSM location was categorized into apex, peripheral, and bladder neck. Survival was estimated using the Kaplan-Meier method. Cox proportional hazard regression models were used to analyze the impact of PSM focality and location status on oncologic survival.

RESULTS:

Of these 476 cases with PSMs, 335 (70.4%) cases were with single focal (sF) PSMs and 141 (29.6%) cases were with multifocal (mF) PSMs. Furthermore, 406 (85.3%) cases were found to have single location (sL) PSMs, and 70 (14.7%) cases were with multilocation (mL) PSMs. The median follow-up was 12.9 years. mF-PSMs and mL-PSMs showed significant impact on increased BCR risk on univariate analysis, and mL-PSMs remained significant on multivariate analysis (P = .048). Furthermore, the combination of multifocality and multilocation showed added prognostic value on predicting BCR-free survival, but not on metastasis-free survival or overall survival.

CONCLUSION:

The presence of mF-PSMs and mL-PSMs, and especially the combination of both, demonstrated significant impact on BCR prognosis. Patients with apex sLsF-PSMs were less likely to have BCR when compared with all those with non-apex sLsF-PSMs. These results should be considered when evaluating patients for adjuvant therapy.

KEYWORDS:

Focality; Location; Prognosis; Prostate cancer; Risk stratification

PMID:
30287224
DOI:
10.1016/j.clgc.2018.08.007

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