Abstract
To determine the utility of dynamic magnetic resonance (MR) imaging in evaluating parotid tumors, dyanamic MR imaging was perfomed in 10 parotid tumors. These included 8 benign and 2 malignant tumors, in which the histopathological diagnosis was established based on examinations of surgical specimens. Five types of time versus signal intensity curves were obtained: type A, curve peaks 0-30 seconds after the administration of contrast material; type B, curve peaks at 30-60 seconds; type C, curve peaks at 60-210 seconds; type D, a gradual upward slope; and type E, flat. A type A curve was specific to Warthin tumors, and a type D curve was specific to pleomorphic adenoma. Malignant tumors showed a type B curve. Dyanamic MRI was thus thought to be useful in predicting the components of parotid tumors.
