AIM: To determine the computed tomography (CT) and magnetic resonance imaging (MRI) features of @entity2909 of the sinonasal cavity. MATERIALS AND METHODS: Six @entity1 with histology-proven @entity2909 in the sinonasal cavity were retrospectively reviewed. All six @entity1 underwent CT and three @entity1 also underwent MRI. The following imaging features were reviewed: size, margin, CT attenuation, MRI signal intensity, and lesion extent. In addition, the time-intensity curve (TIC) of dynamic contrast-enhanced (DCE) MRI and diffusion-weighted imaging (DWI) were analysed in two @entity1 . RESULTS: All @entity2909 had well-defined margins. The mean size was 36 mm (range 20-51 mm). On unenhanced CT, the lesions appeared isodense to cerebral grey matter in four (67%) and slightly hypodense in two (33%) @entity1 . @entity2909 appeared isointense On T1-weighted imaging (WI) and slightly hyperintense on T2WI in three @entity1 . The lesions showed moderate contrast enhancement. Two @entity1 underwent DCE MRI, and the TIC showed a rapidly enhancing and slow washout pattern. The mean apparent diffusion coefficient (ADC) value were 1.66x10(-3) mm(2)/s and 1.78x10(-3) mm(2)/s for the two lesions, respectively. CONCLUSIONS: Well-defined, homogeneous, expansile masses without bony erosion are typical features of @entity2909 . Althrough rare, this entity should be included in the differential diagnosis of @entity5 in this region.

XXXX of the sinonasal cavity: CT and MRI findings.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity2909 :: ('MESH:D007889', 'Disease') :: ['leiomyomas', 'Leiomyomas', 'leiomyoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['benign tumours']
@entity2909 :: (MESH:D007889,Disease) :: ['Leiomyoma']
