Positive surgical margin following radical nephrectomy is an independent predictor of local recurrence and disease-specific survival

Yasmin Abu-Ghanem*, Jacob Ramon, Raanan Berger, Issac Kaver, Edi Fridman, Raya Leibowitz-Amit, Zohar A. Dotan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Positive surgical margins (PSM) are recognized as an adverse prognostic sign and are often associated with higher rates of local and systemic disease recurrence. The data regarding the oncological outcome for PSM following radical nephrectomy (RN) is limited. We examined the predictive factors for PSM and its influence on survival and site of recurrence in patients treated with RN for renal cell carcinoma (RCC). Methods: Clinical, pathologic and follow-up data on 714 patients undergoing RN for kidney cancer were analyzed. Secondary analysis included 44 patients with metastatic RCC upon diagnosis who underwent cytoreductive nephrectomy (CRN). Univariate and multivariable logistic regression models were fit to determine clinicopathologic features associated with PSM. A Cox proportional-hazards regression model was used to test the independent effects of clinical and pathologic variables on survival. Results: PSM was documented in 17 cases (2.4%). PSM were associated with tumour size, advanced pathologic stage (pT3 vs. ≤ pT2) and presence of necrosis. On multivariate analysis, cancer-specific survival (CSS) was associated with tumour stage, size, presence of necrosis and PSM. PSM was also associated with local recurrence but not distant metastasis or overall survival (OS). CSS and OS were comparable between the PSM and metastatic RCC groups, but significantly lower than the negative margin group. Conclusions: The prevalence of PSM following RN is rare. Pathological data, including advanced stage (> pT2), tumour necrosis and tumour size, are associated with the presence of PSM. PSM is associated with tumour recurrence and CSS. Patients with PSM are a potential group for adjuvant therapy or for more careful and thorough follow-up following surgery.

Original languageEnglish
Article number193
JournalWorld Journal of Surgical Oncology
Volume15
Issue number1
DOIs
StatePublished - 2 Nov 2017
Externally publishedYes

Keywords

  • Disease-specific mortality
  • Positive surgical margins
  • Radical nephrectomy
  • Recurrence, progression and overall mortality
  • Renal cell carcinoma

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