上腕骨頭に骨内ガングリオンを合併した腱板断裂の2例

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  • Rotator Cuff Tear Associated with an Intraosseous Ganglion of the Humeral Head

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There are few reports about a case rotator cuff tear with an intraosseous ganglion. We wish to report two cases here. A 44-year-old man (Case 1) was referred with right shoulder pain to us. There was no history as to the cause. He was suffering from motion pain and nocturnal pain. Shoulder motion was slightly limited. Plain X-ray showed a lytic appearance in the proximal of the humeral head. The MRI is demonstrated a low intensity by T1-weighted images and a high intensity by T2-weighted images. Arthrography revealed a complete cuff tear. A rotator cuff tear with an intraosseous ganglion was diagnosed and operated on. The operative findings showed a 1.5×1.0 cm size supraspinatus tear and an intraosseous ganglion which had transparent jelly contents. The histological finding was an inner layer of fibrous connective tissue without any lining cells. A 48-year-old- man (Case 2) felt pain in his left shoulder when he lifted a heavy object. He complained of moderate rest pain and slight restriction of the ROM of his left shoulder. The MRI findings were similar to case 1. The intraoperative findings were a supraspinatus tear with the intraosseous ganglion in the posterior portion of the greater tuberosity. An intraosseous ganglion of the humeral head is rare and its correlation with the cuff tear was unclear. In both cases, the genesis of the intraosseous ganglion cyst may be related to a long-term impingment between the greater tuberosity of the humerus and the acromion.

収録刊行物

  • Katakansetsu

    Katakansetsu 21 (3), 537-540, 1997

    Japan Shoulder Society

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