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Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome

  • Authors:
    • Daisuke Watanabe
    • Akio Horiguchi
    • Shinsuke Tasaki
    • Kenji Kuroda
    • Akinori Sato
    • Junichi Asakuma
    • Keiichi Ito
    • Tomohiko Asano
  • View Affiliations / Copyright

    Affiliations: Department of Urology, National Defense Medical College, Tokorozawa 359‑8513, Japan
    Copyright: © Watanabe et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 47-53
    |
    Published online on: October 27, 2017
       https://doi.org/10.3892/mco.2017.1473
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Abstract

Although obesity defined by a high body mass index (BMI) is generally associated with increased risk of renal cell carcinoma (RCC), low BMI has paradoxically been associated with increased tumor aggressiveness and poor prognosis. As anorexia‑cachexia syndrome (ACS) is associated with decreased BMI and is frequently observed in patients with advanced RCC, the present study investigated the association of BMI with tumor aggressiveness and prognosis in RCC in relation to ACS. The association of BMI with clinicopathological parameters was analyzed in 503 consecutive patients who underwent surgery for RCC. Kaplan‑Meier curves and rates of overall survival (OS) stratified by BMI were also compared in relation to the presence or absence of ACS, defined as the presence of anorexia or malaise, and/or weight loss and/or hypoalbuminemia. Low BMI was significantly associated with high‑grade tumors (P=0.0027) and the presence of distant metastasis (P=0.0025), and patients with a lower BMI had significantly shorter OS than those with a higher BMI (P=0.0441). Patients with ACS had a significantly lower BMI (mean, 21.5 kg/m2) than those without ACS (mean, 23.5 kg/m2; P<0.0001) and had significantly shorter OS than those without ACS (P<0.0001). On multivariate analysis, ACS was an independent predictor of short OS [P=0.0089; hazard ratio (HR), 2.21; 95% confidence interval (CI), 1.22‑3.92] and short cancer‑specific survival (P=0.0308; HR, 2.03; 95% CI, 1.07‑3.78); however, BMI was not (P=0.5440 and P=0.6804, respectively). In the 413 patients without ACS at initial presentation, BMI was not associated with any clinicopathological parameters or OS (log‑rank, P=0.4591). BMI itself was not a predictor of survival in patients without ACS, and the association between low BMI and increased tumor aggressiveness and poor prognosis could be due to ACS.
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Copy and paste a formatted citation
Spandidos Publications style
Watanabe D, Horiguchi A, Tasaki S, Kuroda K, Sato A, Asakuma J, Ito K and Asano T: Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome. Mol Clin Oncol 8: 47-53, 2018.
APA
Watanabe, D., Horiguchi, A., Tasaki, S., Kuroda, K., Sato, A., Asakuma, J. ... Asano, T. (2018). Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome. Molecular and Clinical Oncology, 8, 47-53. https://doi.org/10.3892/mco.2017.1473
MLA
Watanabe, D., Horiguchi, A., Tasaki, S., Kuroda, K., Sato, A., Asakuma, J., Ito, K., Asano, T."Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome". Molecular and Clinical Oncology 8.1 (2018): 47-53.
Chicago
Watanabe, D., Horiguchi, A., Tasaki, S., Kuroda, K., Sato, A., Asakuma, J., Ito, K., Asano, T."Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome". Molecular and Clinical Oncology 8, no. 1 (2018): 47-53. https://doi.org/10.3892/mco.2017.1473
Copy and paste a formatted citation
x
Spandidos Publications style
Watanabe D, Horiguchi A, Tasaki S, Kuroda K, Sato A, Asakuma J, Ito K and Asano T: Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome. Mol Clin Oncol 8: 47-53, 2018.
APA
Watanabe, D., Horiguchi, A., Tasaki, S., Kuroda, K., Sato, A., Asakuma, J. ... Asano, T. (2018). Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome. Molecular and Clinical Oncology, 8, 47-53. https://doi.org/10.3892/mco.2017.1473
MLA
Watanabe, D., Horiguchi, A., Tasaki, S., Kuroda, K., Sato, A., Asakuma, J., Ito, K., Asano, T."Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome". Molecular and Clinical Oncology 8.1 (2018): 47-53.
Chicago
Watanabe, D., Horiguchi, A., Tasaki, S., Kuroda, K., Sato, A., Asakuma, J., Ito, K., Asano, T."Impact of body mass index on clinicopathological outcomes in patients with renal cell carcinoma without anorexia‑cachexia syndrome". Molecular and Clinical Oncology 8, no. 1 (2018): 47-53. https://doi.org/10.3892/mco.2017.1473
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