Comparison of MRI and CT in the Evaluation of Unilateral Maxillary Sinus Opacification

Figure 7

Inverted papilloma (IP) in a 32-year-old male with a 18-month history of rhinorrhoea. (a) Coronal unenhanced CT shows right unilateral maxillary sinus opacification (UMSO) with complete obstruction of the ostiomeatal unit. Bowing of the nasal septum and amorphous faint calcification could be associated with fungal disease; however, (b) coronal STIR and (c) contrast-enhanced T1W demonstrate a right nasal cavity lesion with the typical “cerebriform” appearance of IP and attachment point at the inferior orbit. Hyperintense right UMSO with mucosal enhancement indicates inspissated secretions rather than lesion extension.

(a)

(b)

(c)