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( Ryuichi Nakamura ),( Kenji Fujita ),( Rei Omi ),( Kazunari Kuroda ),( Masaki Takahashi ),( Kazumi Ikebuchi ),( Hitoshi Nishimura ),( Yasuo Katsuki ) 대한슬관절학회 2017 대한슬관절학회지 Vol.29 No.3
Since distal femoral varus osteotomy (DFO) -specific plates had not been available in Japan before 2015, we performed DFO using a plate for tibia. The purpose of this study was to elucidate the efficacy and problems associated with the non-specific plate in DFO. We used NCB-PT plates (Zimmer Inc.) in the upside-down position and the minimum 5-year outcomes were evaluated. The mean preoperative weight bearing line ratio and Japanese Orthopaedic Association score improved from 97.6%±35.8% and 68.0±11.5, respectively, to 44.0%±16.1% and 82.0±7.6, respectively, 1 year postoperatively and to 42.8%±15.7% and 86.0±8.2, respectively, 5 years postoperatively. The flexion range decreased from 149.0°±6.5° to 138.0°±5.7° 1 year postoperatively and to 135.0°±20.9° 5 years postoperatively. Although DFO using the NCB-PT plate provided mid-term benefits, it resulted in a loss of knee flexion, possibly due to excessive coverage of the medial femoral epicondyle.
Association between Age and Trunk Muscle Area and Density in Patients with Spinal Metastases
Dohzono Sho,Sasaoka Ryuichi,Takamatsu Kiyohito,Nakamura Hiroaki 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.5
Study Design: A retrospective study.Purpose: This study aimed to evaluate the relationship between age and trunk muscle composition and between trunk muscle composition and overall survival in patients with spinal metastasis.Overview of Literature: A low skeletal muscle mass is associated with a poor overall survival in patients with cancer. However, no previous studies have evaluated the relative effects of age and disease on muscle mass and muscle quality in patients with advanced cancer.Methods: This study included 539 patients diagnosed with spinal metastasis from February 2009 to July 2018. The patients were categorized into four groups based on age: <59, 60–69, 70–79, and ≥80 years. Differences in trunk muscle composition among age groups and among groups were classified on the basis of survival (< or >3 months after spinal metastasis diagnosis) were evaluated.Results: In total, 515 patients (273 men, 242 women; mean age, 67.8 years) with complete medical records were included in the analysis. No significant differences were observed in the area of the psoas and paravertebral muscles among age groups in either sex. A significant trend toward a low muscle density with the increase in age was found for both sexes. Patients who survived less than 3 months had significantly smaller trunk muscle area than those who survived for more than 3 months in both sexes.Conclusions: The results suggest that the reduction in muscle density is associated with advanced age, whereas a decreased muscle area is associated with pathology. Additionally, a small trunk muscle area was associated with a short overall survival. Further studies are needed to elucidate the underlying mechanisms of age- versus cancer-related changes in the muscle area and their influence on overall survival.