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Well-defined expansile mass affecting the right maxillary sinus with remodelling and erosion of the anterior, medial and posterior walls. It has slight heterogeneous high T2 signal, low T1 and demonstrates thin, linear peripheral enhancement. Right maxillary infundibulum is obstructed by enhancing mucosa. Surrounding fat planes are well preserved. No suspicious lymph nodes. Loss of normal right maxillary marrow signal.