Preoperative magnetic resonance imaging for localization of the origin of maxillary sinus inverted papillomas

Purpose

It is essential to precisely localize the origin of an inverted papilloma within the maxillary sinus by preoperative imaging so that the lesion can be excised as thoroughly as possible. In the present study, we evaluated the use of preoperative magnetic resonance imaging (MRI) for pinpoint localization of the origin of inverted papillomas.

Materials and Methods

The subjects were patients with an inverted papilloma of the maxillary sinus. Given the known histopathological features and pattern of growth of this tumor, we obtained preoperative MRIs in an attempt to localize its origin.

Results

When different interpretation methods were applied to the preoperative MRIs, there was up to an 85.7% correlation with the surgical results for localization of the tumor origin.

Conclusions

We were able to demonstrate a high rate of agreement between diagnostic imaging and the actual surgical findings in identification of the origin of inverted papillomas.