Abstract
Oncocytoma is usually a benign tumor composed solely of oncocytes. This tumor generally arises from the salivary gland, thyroid, nasal gland, bronchia, pancreas and mammary gland, and most preferably originates in the parotid gland, however, its incidence is extremely low.
We presented the case of a 54-year old female who had an oncocytoma of the superficialis parotid gland. Her chief complaint was swelling in the right parotid gland region. CT scanning showed a limited slightly high density mass in the right parotid gland and MR-CT scanning revealed a high intensity mass with pulse sequence of short Spin Echo.
Accumulated sodium pertechnatate Tc 99m of the right parotid gland was lower than in the left one, and the time activity curve showed no functional difference in either side.
We suspected a cyst from the scanning, and attempted a puncture aspiration. About 2ml of light yellow fluid was aspirated from the swollen site.
In histological examination of this fluid, leukocytes, histiocytes, squamous cells and transitional epithelial cells were found.
The swelling disappeared but a soybean sized mass could be felt in this region. Therefore we operated to remove a clear border soybean sized mass with semi parotid tissues in the superficial region.
The his tiological diagnosis was oncocytoma. The patient is in good condition with no recurrence as of 2 years postoperatively.
