title: Sinonasal ossifying fibroma with fluid-fluid levels on MR images.
abstract: 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.
mesh_terms: D000328:Adult; D005005:Ethmoid Sinus; D005260:Female; D018214:Fibroma, Ossifying / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D009296:Nasal Cavity / Q000473:pathology; D009298:Nasal Polyps / Q000175:diagnosis* / Q000473:pathology; D009669:Nose Neoplasms / Q000175:diagnosis* / Q000473:pathology; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis* / Q000473:pathology