副耳下腺と主耳下腺とに多発した単形腺腫

概要

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Accessory parotid glands are located far anterior to main parotid glands. They have been reported to be present in 20-30% of human cadavers. However, tumors of accessory parotid glands are rare. Only 18 cases have been reported in Japan.We treated a 49-year-old woman who had had a mass in her left cheek for one year. The diagnosis was confirmed by sialogram and palpation of the parotid gland. The accessory parotid gland had its own duct which flowed into Stensen's duct. Although the sialogram revealed no tumors of the parotid gland, palpation was suggestive of small tumors in both the accessory and main parotid glands on the left. The tumor was resected surgically with en bloc resection of the main parotid gland. Histopathological study revealed a monomorphic adenoma.Tumors arising in accessory parotid glands are a distinct entity. The diagnosis is made on the basis of clinical examination and a high index of suspicion.
耳鼻咽喉科臨床学会の論文