Kazutomo Onishi

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BACKGROUND Idiopathic adhesive capsulitis is defined as a frozen shoulder with severe and global range-of-motion loss of unknown etiology. The purpose of our study was to clarify the prevalence of rotator cuff lesions according to patterns and severity of range-of-motion loss in a large cohort of patients with stiff shoulders. METHODS Rotator cuff(More)
BACKGROUND Fatty degeneration of the cuff muscles is usually evaluated at the Y-view in oblique sagittal images. It was recently proposed that muscle shift after repair may influence the fatty degeneration values, and the evaluation of the muscles at a more medial site was recommended. However, the differences in muscle quality in accord with measurement(More)
BACKGROUND This study investigated the morphologic changes in the biceps tendon using ultrasonography before and after successful arthroscopic posterosuperior rotator cuff repair. METHODS Forty-four patients (44 shoulders) underwent arthroscopic posterosuperior rotator cuff repair with 1-year postoperative magnetic resonance imaging (MRI) follow-up. The(More)
The implants used in reverse shoulder arthroplasty were originally designed for white patients; thus, they might not be optimal for smaller Asian patients. The selection of reverse shoulder arthroplasty systems is limited in Japan. The purpose of this study was to measure the geometry of the proximal humerus in elderly Japanese patients to inform implant(More)
In a case of infarction in the lower cervical spinal cord, F-waves were lost in the paralyzed hand muscles 48 hours after the onset, in spite of normal compound muscle action potentials (CMAP). Subsequently the amplitude of CMAP decreased markedly in size 14 days later, when needle EMG revealed acute denervation. At 11 days after the onset MRI demonstrated(More)
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