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腮腺混合瘤經多次復發轉變成囊狀腺癌-病例報告

Recurrent Parotid Mixed Tumor with Malignant Change to an Adenoid Cystic Carcinoma - Case Report

摘要


混合性瘤好發於腮腺,手術後之復發機率很高,但因多次復發而轉變成癌之病例則很少,並且以轉變成惡性混合性癌最為常見,而轉變成囊狀腺癌,正式文獻報告僅有1例。本科也經歷1例,為經多次復發後轉變成囊狀腺癌。手術後,並接受放射線局部治療,到目前追蹤1年10個月仍然控制良好,特提出報告。

並列摘要


Nearly 60-80% of benign tumors in the parotid gland is mixed tumor. Simple enucleation carries a high recurrent rate (25-50%) due to incomplete removal of the tumors. Approximately 2-9% of all recurrent mixed tumor undergo malignant transformation. The malignant transformation possesses a correlation between the duration and frequency of the recurrence. The most common malignant change of mixed tumor is carcinoma ex pleomorphic adenoma. In the literature, there is only one case report with recurrent mixed tumor following malignant transformation to the adenoid cystic carcinoma in the parotid gland. We present a case of recurrent mixed tumor of right parotid gland which has been treated by surgical resection for three times. But unfortunately, the masses recurred again, and she received radical parotidectomy with facial scarification later. The pathological report was adenoid cystic carcinoma, cribriform type. Yet, after that the patient received post-operative radio-therapy, there been no evidence of recurrence till now.

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