[The evaluation of panoramic sialography applied in the diagnosis of parotid tumas].

Panoramic sialography is a new method applied in the diagnosis of parotid tumors.we have examined 33 cases of parotid tumors by this way and: 1.In sialograms of benign tumors,we discovered obvious filling-deficiency areas and moving position of ducts as well as margins of mass. 2. We also found interrupted branches of duct and transudation of contrast medium in sialograms of malignant tumor,in addition, the region of tumor could be depicted. 3.Thus,panoramic sialography has its distinctive advantages in nature of parotid tumors according to variations of ducts and globs with parotid gland.