抄録
Computed tomography (CT) has been widely used in the investigation of salivary disease. The purpose of this article is to discuss the differential diagnosis of masses in the salivary gland using CT.
Seventeen patients with a palpable mass in parotid or submandibular gland were studied. The lesions included eleven pleomorphic adenomas, one Warthin's tumor, one oncocytoma, one lymphadenitis and three cases of adenocarcinomas.
CT scans were performed in the axial projection with contiguous 5-mm-thick slices. An initial 50-ml bolus of iohexol (Omnipaque 300) was administered to the patient intravenously followed by a continuous contrast medium drip infusion.
Enhancement ratio (E. R.) and Standard deviation ratio (S. D. R.) were defined. E. R. ranged from 0.5 to 2.0 in parotid masses and 0.8 to 1.9 in submandibular ones. S. D. R. varied from 0.2 to 5.2 and 0.1 to 6.3 respectively. Either E. R. or S. D. R. exhibited high value in each malignant tumor. E. R. and S. D. R. may be useful parameters in detecting the malignancy of a salivary gland mass.
