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. 2021 Mar 23;28(2):1325-1337.
doi: 10.3390/curroncol28020126.

Body Composition as a Predictor of Toxicity and Prognosis in Patients with Diffuse Large B-Cell Lymphoma Receiving R-CHOP Immunochemotherapy

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Body Composition as a Predictor of Toxicity and Prognosis in Patients with Diffuse Large B-Cell Lymphoma Receiving R-CHOP Immunochemotherapy

Jiaxun Guo et al. Curr Oncol. .

Abstract

Background: Our study measured the body composition of Diffuse large B-cell lymphoma (DLBCL) patients receiving rituximab with cyclophosphamide, doxorubicin, vincristine and prednisone (R-CHOP) regimen by computed tomographic (CT) and assessed their correlation with treatment-related toxicity and other adverse outcomes.

Methods: We retrospectively analyzed 201 DLBCL patients who underwent pre-treatment abdominal CT examination. CT images were used to assess body composition metrics at the third lumbar vertebrae including fat tissues and muscle. Based on the skeletal muscle area (SMA) and density (SMD), skeletal muscle index (SMI), skeletal muscle gauge (SMG = SMI × SMD) and lean body mass (LBM) were calculated. Also analyzed were the toxicity, adverse events and survival.

Results: We found that SMG, SMD, SMI and LBM were correlated with any grade 3-4 toxicity, dose reduction, hospitalization or termination of the treatment due to immunochemotherapy and worse survival. However, multivariate analysis demonstrated SMG [progression-free survival (PFS): hazard ratio (HR), 2.889; 95% CI, 1.401-5.959; p = 0.004; overall survival (OS): HR, 2.655; 95% CI, 1.218-5.787; p = 0.014] was the best predictor of poor prognosis.

Conclusions: SMG, SMD, SMI and LBM were identified as predictors of adverse reactions and poor survival. SMG was an innovative and valuable indicator of immunochemotherapy toxicity and other adverse outcomes. Additionally, it can be used to individualize antineoplastic drug dosing.

Keywords: diffuse large B-cell lymphoma; immunochemotherapy; sarcopenia; survival; toxicity.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
An example of abdominal computed tomography (CT) image. (A) The original CT image. (B) Skeletal muscle are quantified range of (−29 to + 150 Hounsfield units), and they were outlined along the epimysium that surrounded the muscles.
Figure 2
Figure 2
Risk of toxicity based on body composition. (A) SMG (skeletal muscle gauge), (B) SMD (skeletal muscle density), (C) SMI (skeletal muscle index), (D) LBM (lean body mass).
Figure 3
Figure 3
Kaplan–Meier curves of PFS for patients by body composition. (A) SMG (skeletal muscle gauge), (B) SMD (skeletal muscle density), (C) SMI (skeletal muscle index), (D) LBM (lean body mass).
Figure 4
Figure 4
Kaplan–Meier curves of OS for patients by body composition. (A) SMG (skeletal muscle gauge), (B) SMD (skeletal muscle density), (C) SMI (skeletal muscle index), (D) LBM (lean body mass).

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