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- W2901231685 abstract "Background: Bone pain resulting from myeloma bone lesions and corticosteroid used in treatment regimens tend to impair performance status (PS) and decrease muscle mass in myeloma patients. One of the important issues when treating myeloma patients is the maintenance of muscle mass. Methods: Participants of this study were patients newly diagnosed with symptomatic multiple myeloma at Tokushima University Hospital from 2003 to 2016. Patients who had undergone computed tomography including the lumbar spine within one year of the initial diagnosis were chosen and analyzed retrospectively. A functional tool, AquariousNET, image viewer was used with manual trace method to measure the cross-sectional area of the psoas and gluteal muscles at the L3 level. This study was approved by the internal review board of the Tokushima University (permission number 2756-1). Results: 37 patients (17 men and 20 women) were included in the analysis with a mean age of 62.1±10.6 (median 65) years. High-dose dexamethasone (HDD), including vincristine, doxorubicin and dexamethasone (VAD) therapy, melphalan combined with prednisolone (MP), immunomodulatory drugs, and proteasome inhibitor (PI) were used as induction chemotherapy in 15, 6, 2, and 14 patients, respectively. Among them, 1, 1, 0, and 2 patients had a PS score of 3–4, while 6, 4, 0, and 5 patients had a bone scale score of 3. Within 6 months of treatment initiation, patients in PI-based treatment groups had a tendency to retain more muscle mass in the psoas muscle (99.3±22%) when compared to baseline, than did the HDD based treatment group (87.94±9.93%). Gluteal muscles were significantly decreased in the HDD-based treatment group compared with the PI-based treatment group (85.84±12.63% vs. 109.42±17.82%; p < 0.05) within 6 months. The muscle mass values in HDD/MP/PI groups 6-12 months after initial chemotherapy were 85.99 ±13.46/75.4±13.2/92.43±18.98% (psoas muscle) and, 87.81±16.08/89.2±20.1/96.66±9.3% (gluteal muscle) compared to baseline. All patients in the HDD-based treatment group had a decrease in muscle mass, whereas 4 of 14 patients in the PI-based treatment group had increase in the muscle mass 6-12 months after initial chemotherapy. Conclusions: Proteasome inhibitor may have the ability to reduce the muscle mass loss during treatment in myeloma patients. Legal entity responsible for the study: Shingen Nakamura. Funding: Has not received any funding. Disclosure: All authors have declared no conflicts of interest." @default.
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- W2901231685 date "2018-11-01" @default.
- W2901231685 modified "2023-09-27" @default.
- W2901231685 title "Alteration of muscle mass after chemotherapy in patients with newly diagnosed multiple myeloma" @default.
- W2901231685 doi "https://doi.org/10.1093/annonc/mdy444.024" @default.
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