Resection of inverted papilloma. There are findings related to left sinonasal surgery, including partial maxillectomy and turbinectomy. There is interval decrease mucosal thickening in the left maxillary sinus and ethmoid cavity. However, there is persistent nodular lesion along the left aspect of the nasal septum measuring up to 9 mm in width. The lesion displays high T1 and low T2 signal centrally and low T1 and high T2 signal peripherally. There are small retention cysts in the right maxillary sinus. There is also mild scattered mucosal thickening in the left maxillary sinus and bilateral ethmoid air cells and frontoethmoid recesses. There is a defect in the left lamina papyracea. There is no evidence of intracranial mass. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation.
Findings related to prior left sinonasal surgery for resection of a inverted papilloma with a persistent nonspecific nodular lesion along the left aspect of the nasal septum measuring up to 9 mm in width. DIfferential considerations include residual treated tumor or organizing hematoma, for example. However, assessment is limited by the lack of intravenous contrast and the lack of dedicated thin-section images of the sinuses.