title: [Evaluation of RI scintiscanning to parotid gland tumors].
abstract: We retrospectively evaluated preoperative radioisotope (RI) scintiscans in 275 patients (283 glands) with parotid tumors who undergoing surgery between 1987 and 2000. Technetium-99m-pertechnetate (Tc) scintigraphy was conducted on 201 glands. Oncocytoma and Warthin's tumor showed a high positive rate. In evaluating Warthin's tumor with Tc scintigraphy, sensitivity was 75% and specificity 88%; above the age of 40 years, specificity exceeded 90%. Gallium-67-citrate (Ga) scintigraphy was conducted on 207 glands. Malignant parotid tumors showed high positivity (85%), but the specificity of positive findings was quite low (38%) because 44% of benign pleomorphic adenoma, which occupied major material, showed Ga-positive findings. Ga-negative findings indicated high probability (95%) of benign tumors. Thus, Tc scintigraphy is effective in diagnosing Warthin's tumor, while Ga scintigraphy is effective in diagnosing benign tumors.
authors.affiliation: Department of Otolaryngology, Kobe City General Hospital, Kobe.
authors.forename: S
authors.initials: S
authors.lastname: Shinohara
authors.forename: E
authors.initials: E
authors.lastname: Yamamoto
authors.forename: M
authors.initials: M
authors.lastname: Tanabe
authors.forename: T
authors.initials: T
authors.lastname: Maetani
authors.forename: K
authors.initials: K
authors.lastname: Fujiwara
authors.forename: T
authors.initials: T
authors.lastname: Kim
mesh_terms: D000235:Adenolymphoma / Q000000981:diagnostic imaging*; D018249:Adenoma, Oxyphilic / Q000000981:diagnostic imaging*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005708:Gallium; D006801:Humans; D008297:Male; D008875:Middle Aged; D010306:Parotid Gland / Q000000981:diagnostic imaging*; D010307:Parotid Neoplasms / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013670:Sodium Pertechnetate Tc 99m
chemical_list: D019275:Radiopharmaceuticals; C034163:gallium chloride; D013670:Sodium Pertechnetate Tc 99m; D005708:Gallium