巨大な耳下腺多形腺腫再発例

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  • A Case of Recurrent Giant Pleomorphic Adenoma of the Parotid Gland
  • 臨床 巨大な耳下腺多形腺腫再発例
  • リンショウ キョダイ ナ ジカセン タケイセン シュ サイハツレイ

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An 85-year-old woman was referred with a left-side pre- and infra-auricular mass. She had no complaints such as pain and facial paresis with the exception of the large mass. In the past history, she had undergone four operations for a parotid gland tumor. The CT scan showed a 110×80 mm mass arising from the parotid gland. MRI imaging indicated a smooth and encapsulated mass. The pre-operative diagnosis was a large pleomorphic adenoma of the parotid gland. In the intraoperative findings, the tumor was located in the deep lobe and some branches of the facial nerve were sacrificed to remove the tumor. The extirpated tumor was 12 cm in diameter and weighed 570 g. Based on the histopathological findings, the tumor was diagnosed as pleomorphic adenoma without malignant change. Early operative removal of the tumor should be performed as much as possible in case of pleomorphic adenoma of the parotid gland due to the possibility of malignant change and the increasing size of the tumor.

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