USEFULNESS OF DYNAMIC MRI FOR ESTIMATING THE EXTENT OF ATTACHMENT OF A SINONASAL PAPILLOMA

Abstract

　Preoperative estimation of the extent of tumor attachment to allow selection of the appropriate surgical procedure for complete resection of the tumor is recommended in cases of sinonasal papilloma. Conventional CT and MRI are useful to estimate the extent of attachment for tumors showing narrow attachment, but not for those showing broad attachment. We estimated the extent of tumor attachment using dynamic MRI to enhance the over-time contrast effect. The results revealed different contrast effects between slices including the attachment and slices not including the attachment, which may be expected to allow accurate estimation of the extent of attachment even for tumors showing wide. attachment. Although dynamic MRI is not easy to perform, it appears to be advantageous for estimating the extent of attachment even for tumors showing broad attachment.