A Case of Multiple Oncocytomas in the Bilateral Parotid Glands.

DOI 7 Citations 33 References

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  • 両側耳下腺ｏｎｃｏｃｙｔｏｍａ例

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Abstract

We report here a case of multiple oncocytomas that occured in the bilateral parotid glands. A 58-year-old female patient visited our hospital because of a mass that had existed for about 3 years in the left parotid region. Echography noted a hypoechoic lesion, CT scanning and MRI showed 3 masses in the left parotid gland, and 1 mass in the right parotid gland. There was a rapid and high accumulation of 99mTc in the tumor lesion by 99mTc-pertechnetate scintigraphy. A subtotal parotidectomy was performed on the left gland, and a partial parotidectomy of the superficial lobe was performed on the right gland. The histopathologic diagnosis was oncocytoma in the bilateral glands. Malignant oncocytoma that recur or metastasize have been previously reported. Oncocytoma is thought to be a difficult malignancy to diagnose, thus we needed to follow up carefully. To our knowledge, there have been no previous reports of multiple oncocytoma in the bilateral parotid glands. There has been no sign of recurrence or metastasis of the tumors. We also discuss the differential diagnosis, and the most appropriate treatment method.

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