Purpose: Sarcopenia is suggested to be associated with cancer-related inflammation. We assessed the clinical outcome of small cell lung cancer (SCLC) patients according to sarcopenia and the neutrophil-to-lymphocyte ratio (NLR).
Methods: A total of 117 male SCLC patients treated with first-line chemo- or chemoradiotherapy were assessed based on a retrospective chart review. The mass of the pectoralis muscle was measured by computed tomography and normalized to height. Patients with the lowest quartile of muscle mass were considered to have sarcopenia. Patients were classified into four groups according to their sarcopenia and NLR statuses: sarcopenia/high NLR, sarcopenia/low NLR, non-sarcopenia/high NLR, and non-sarcopenia/low NLR.
Results: Sarcopenic patients had lower progression-free survival (PFS) than did non-sarcopenic patients (median 6.0 vs. 7.5 months, p = 0.009), but the difference in overall survival (OS) was not statistically significant (median 10.5 vs. 13.5 months, p = 0.052). However, the OS of sarcopenic patients with high NLR was significantly lower than that in all other groups (median 3.2 vs. 16.0 vs. 12.5 vs. 13.7 months, respectively, p < 0.001), as was PFS (median 3.2 vs. 7.7 vs. 7.6 vs. 7.1 months, respectively, p < 0.001). On multivariate analysis, sarcopenia with high NLR was an independent prognostic factor for shorter PFS and OS. Early discontinuation of treatment (20.0 vs. 10.3 %) and treatment-related mortality (50.0 vs. 8.4 %) occurred more frequently in these patients than in the other groups (p < 0.001).
Conclusions: In SCLC, sarcopenic male patients with high NLR have a poor prognosis and do not tolerate standard treatment. Intensive supportive care is needed in these patients.
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