Negative impact of skeletal muscle loss after systemic chemotherapy in patients with unresectable colorectal cancer

Yuji Miyamoto, Yoshifumi Baba, Yasuo Sakamoto, Mayuko Ohuchi, Ryuma Tokunaga, Junji Kurashige, Yukiharu Hiyoshi, Shiro Iwagami, Naoya Yoshida, Masayuki Watanabe, Hideo Baba

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Abstract

Background: Skeletal muscle depletion (sarcopenia) is closely associated with limited physical ability and high mortality. This study evaluated the prognostic significance of skeletal muscle status before and after chemotherapy in patients with unresectable colorectal cancer (CRC). Methods: We conducted a retrospective analysis of 215 consecutive patients with unresectable CRC who underwent systemic chemotherapy. Skeletal muscle cross-sectional area was measured by computed tomography. We evaluated the prognostic value of skeletal muscle mass before chemotherapy and the rate of skeletal muscle change in cross-sectional area after chemotherapy. Results: One-hundred-eighty-two patients met our inclusion criteria. There were no significant differences in progression-free survival (PFS) or overall survival (OS) associated with skeletal muscle mass before chemotherapy. However, 22 patients with skeletal muscle loss (>5%) after chemotherapy showed significantly shorter PFS and OS compared with those without skeletal muscle loss (PFS, log-rank p = 0.029; OS, log-rank p = 0.009). Multivariate Cox regression analysis revealed that skeletal muscle loss after chemotherapy (hazard ratio, 2.079; 95% confidence interval, 1.194-3.619; p = 0.010) was independently associated with OS. Conclusions: Skeletal muscle loss after chemotherapy was an independent, negative prognostic factor in unresectable CRC.

Original languageEnglish
Article numbere0129742
JournalPloS one
Volume10
Issue number6
DOIs
Publication statusPublished - Jun 12 2015

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Miyamoto, Y., Baba, Y., Sakamoto, Y., Ohuchi, M., Tokunaga, R., Kurashige, J., Hiyoshi, Y., Iwagami, S., Yoshida, N., Watanabe, M., & Baba, H. (2015). Negative impact of skeletal muscle loss after systemic chemotherapy in patients with unresectable colorectal cancer. PloS one, 10(6), [e0129742]. https://doi.org/10.1371/journal.pone.0129742