A study of the usefulness of MRI in three cases of parotid tumor.

概要

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In diagnosing parotid tumors, Magnetic Resonance Imaging (MRI) seems to be markedly superior to CT in the following ways: increased ability to contrast and differentiate between soft tissues; improved imaging of vascular structures without the use of a contrast medium; the possibility of three-dimensional tomography; and the ability to study the basicranial bone or air in the paranasal sinuses without artifacts. In this study, the authors examined the MRI findings in 3 cases of parotidectomy in which observation of the gland of the unaffected side was also made.<BR>(1) The anatomical position of the tumor could be located exactly, and discrimination could also be made between the surrounding tissue and the tumor by the comprehensive examination of each 3-dimenjional image.<BR>(2) The retromandibular vein could be located in all horizontal images. In 1 of the 3 cases, the position of a tumor, whether pars superficialis or pars profunda, could be determined from the position of the vein.<BR>(3) Malignancy could not be determined on the basis of the morphology and inner structure of the tumor.
一般社団法人日本口腔腫瘍学会の論文