肩滑液包内脂肪腫の1例

  • 村上 剛史
    独立行政法人国立病院機構九州がんセンター整形外科
  • 横山 良平
    独立行政法人国立病院機構九州がんセンター整形外科
  • 畑野 崇
    独立行政法人国立病院機構九州がんセンター整形外科
  • 西山 憲一
    独立行政法人国立病院機構九州がんセンター病理診断科

書誌事項

タイトル別名
  • Lipoma of the Subdeltoid Bursa of the Shoulder Joint: A Case Report

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Intraarticular lipoma (lipoma arborescens) is a rare condition characterized by villous or papillary appearance and covered with synovial membrane. This condition most commonly affects the knee joint and rarely other joints. We report a rare case of lipoma arborescens of the shoulder joint. The patient was a 60-year-old female with a two-week history of pain and swelling in her left shoulder. Physical examination revealed an elastic, palpable mass measuring 5×5 cm with mild pain on push at the anterior aspect of the left shoulder joint. On MRI, the sharply-demarcated tumor was located in the subdeltoid bursa, showing high but slightly inhomogeneous signal on T1- and T2 weighted images. At surgery the lesion was located within the subdeltoid bursa and papillary on appearance. Histologically, the lesion consisted of the proliferation of mature adipose cells with villous structure and admixed with blood vessels, fibrous tissues and chronic inflammatory infiltrates. These features were consistent with those of lipoma arborescens.

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