Abstract
99mTcO4- and 67Ga-citrate scintigraphies were preoperatively applied to 26 cases of parotid adenolymphoma. 99mTcO4- scintigraphy revealed focal hot image on 18 sites (69%), normal image on three sites (12%), and cold image on five sites (19%). Macroscopic cystic degeneration and microscopic collagenous degeneration were suspected to be the factors by which 99mTcO4- scintigraphy resulted in normal or cold scintigram.
67Ga-citrate scintigraphy showed normal scan in 21 sites of tumor (81%), and diffuse of focal hot scan in five sites (19%). Three out of five Ga-positive cases were preceeded by sialography. Other two cases had the evidences of abscess formation in the tumor or acute inflammatory response around the tumor.
