Visceral obesity is associated with better recurrence-free survival after curative surgery for Japanese patients with localized clear cell renal cell carcinoma

Gou Kaneko, Akira Miyajima, Kazuyuki Yuge, Satoshi Yazawa, Ryuichi Mizuno, Eiji Kikuchi, Masahiro Jinzaki, Mototsugu Oya

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Objective: To investigate the prognostic significance of visceral obesity to predict recurrence after curative surgery for Japanese patients with localized renal cell carcinoma. Methods: The data of 285 patients who underwent curative surgery for localized renal cell carcinoma were retrospectively reviewed. Median follow-up was 36.7 months. The association between visceral obesity and recurrence-free survival rate was evaluated using the Kaplan-Meier method and Cox regression models. Visceral fat area at the level of the umbilicus measured using pre-operative computed tomography was used as an index of visceral obesity. Results: Twenty-nine patients (10.2%) experienced recurrence. Five-year recurrence-free survival rates were 91.3% in high visceral fat area group (≥120 cm2) and 76.9% in low visceral fat area group (<120 cm2) (P = 0.037); however, visceral fat area was not an independent predictor of recurrence- free survival in multivariate analysis. In the patients with clear cell renal cell carcinoma, 28 patients (11.6%) experienced recurrence. Five-year recurrence-free survival rates were 88.7% in high visceral fat area group and 71.0% in low visceral fat area group (P = 0.043), and visceral fat area was an independent predictor of recurrence-free survival (hazard ratio: 1.974, P = 0.042) as well as C-reactive protein, Fuhrman nuclear grade, tumor size and microvascular invasion. In patients with organ confined clear cell renal cell carcinoma in particular, visceral fat area was also a useful and independent predictor of recurrence-free survival (hazard ratio: 2.807, P = 0.038). Body mass index was not useful in either cohort. Conclusions: High visceral fat area was a positive predictive biomarker for better recurrence-free survival after curative surgeries for localized clear cell renal cell carcinomas; however, body mass index was not a predictor.

Original languageEnglish
Pages (from-to)210-216
Number of pages7
JournalJapanese journal of clinical oncology
Volume45
Issue number2
DOIs
Publication statusPublished - 2015 Feb 1

Keywords

  • Clear cell renal cell carcinoma
  • Obesity
  • Recurrence-free survival
  • Renal cell carcinoma
  • Visceral obesity

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research

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