title: Lipoma in the subscapularis muscle causing scapular malposition.
abstract: A 70-year-old woman had pain and fatigability of her left shoulder with asymmetric scapular position. The medial border of the scapula was more prominent in the left side compared to the right scapula, and scapular motion was different between sides. Magnetic resonance imaging showed a mass on the ventral surface of the scapula. Tumour resection was performed through the medial approach, and the tissue samples were found to be a lipoma with a pathological examination. Post-operatively, her pain immediately disappeared. Two years after surgery, no recurrence of the tumour had been found. Soft tissue tumours have never been reported as a cause of scapular malposition or winging. We reported a case with scapular malposition and dyskinesis caused by lipoma in the subscapularis muscle. Surgical resection successfully relieved her symptoms and improved the scapular motion. Soft tissue tumour occurring in the subscapularis muscle could possibly cause abnormal scapular position and motion.
authors: Department of Orthopedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors: Yusuke
authors: Y
authors: Kawano
authors: Department of Orthopedic Surgery, Kawasaki Municipal Hospital, Kawasaki, Kanagawa, Japan.
authors: Noriaki
authors: N
authors: Nakamichi
authors: Department of Orthopedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors: Noboru
authors: N
authors: Matsumura
keywords: Rotator cuff lipoma; scapular dyskinesis; scapular malposition; scapular winging; subscapularis lipoma