RT Journal Article SR Electronic T1 Sinonasal Ossifying Fibroma with Fluid-Fluid Levels on MR Images JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1639 OP 1641 VO 24 IS 8 A1 Kendi, Ayse Tuba Karagulle A1 Kara, Simay A1 Altinok, Deniz A1 Keskil, Semih YR 2003 UL http://www.ajnr.org/content/24/8/1639.abstract AB Summary: Ossifying fibroma is a rare benign neoplasm that usually affects mandibular and maxillary bones. In this report, we present a case of sinonasal ossifying fibroma with fluid-fluid levels and posterior extension toward the torus tubarius on MR images.