Sinonasal carcinoma status post induction chemotherapy followed by bifrontal anterior fossa skull base approach with frontal bone osteotomy, craniotomy and combined intradural and extradural approach to skull base tumor invading the dura, resection of tumor with complex dural closure with pericranial graft and split bone cranioplasty, microsurgical dissection, harvesting of abdominal fat autograft and insertion of a lumbar subarachnoid drain on March 11, 2010 followed by adjuvant chemoradiation completed July 10, 2010 and multiple complications. There are post-treatment findings in the anterior cranial fossa and sinonasal regions. There is encephalomalacia in the anterior frontal lobes, right more than left. There is unchanged partially enhancing soft tissue along the left frontal osteotomy site and along the roof of the ethmoid cavity. There is otherwise diffuse mucosal thickening and secretions within the imaged sinonasal cavities. There is no evidence of intraparenchymal brain tumors or acute infarction. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. There is medial rotation of the bilateral globes.
Post-treatment findings for sinonasal carcinoma with unchanged partially enhancing soft tissue along the left frontal osteotomy site and along the roof of the ethmoid cavity, which may represent granulation tissue and inflammation versus perhaps less likely tumor. 