小児に発生した肩関節石灰沈着性腱炎の1例

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Clinical reports of calcific tendinitis of the shoulder in children are very rare, and two cases could be found in the literature 2)3). We report a case of calcific tendinitis of the rotator cuff in a child. The patient was a six-year-old boy. He suffered from right shoulder pain after gathering shellfish at the low tide without history of trauma. The right shoulder motion was severely limited due to pain. There was localized tenderness around the lesser tuberosity. Plain radiography, CT, and MRI showed a large calcific deposit in the subscapularis tendon. He was diagnosed with calcific tendinitis and treated conservatively. He made a full recovery and radiographs showed disappearance of calcification 4 weeks after the start of symptoms. Calcific tendinitis of the rotator cuff is common in middle-aged patients and it is often assumed to be secondary to degenerative change in necrotic tendon. There are very few cases of calcific tendinitis affecting a child, an age at which degenerative changes seem unlikely. There is no theoretical reason why this should not occur in a child. There was a possibility that over use while gathering shellfish triggered inflammation around the insertion of subscapularis tendon.