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There is total opacification of the left maxillary antrum extending through a widened , smoothly remodeled osteomeatal unit to fill the whole ipsilateral nasal cavity. It is protruded through the ipsilateral choana to fill the nasopharyngeal air way . It is abutting the soft palate and extending into the right choana to reach the right nasal cavity. The polypoidal soft tissue is homogenous (fluid signals) T2 hyperintense and T1 hypointense. Following GAD there is only smooth peripheral enhancement with no soft tissue enahancement.The remainder ipsilateral sinuses are opacified by retentional phenomenon There is no restricted diffusion. There is small retension cyst in the right maxillary sinus . The imaging finding are most consistent with a large left antrochoanal polyp.