A Case of Sacrococcygeal Bursitis

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  • 仙骨部から尾骨部に生じた滑液包炎の1例

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A 69-year-old woman presented with a subcutaneous painful cyst in the sacrococcygeal region. The resected cyst contained several rice bodies. The wall was yellowish and smooth, and had many protruding structures into the cavity. Histopathologic examination revealed fibrin deposits on the wall covered with several layers of synovial cells, and also thick connective tissues. These histological findings were compatible with bursitis. About one month later, the lesion recurred and was almost identical to its original state, along with the cavity due to the previous operation. At the time of the second operation, the cyst wall was found to be connected with the sacrococcygeal junction where a narrow space existed and a joint-like structure was observed. After a resection of the cyst together with coccygeal bone and joint-like structure, no recurrence has been observed for the past 10 months. The recurrent lesion is thus considered to probably be associated with the joint-like structure in the sacrococcygeal junction.

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