Figure 14: Case report 12. 1. CT scan in coronal section without contrast agent application (left). MRI STIR in coronal (middle) and transverse sections (right). Large mass of the right nasal cavity which deforms the sinus wall (arrow) as well as the septum. Histology: Schwannoma. Mucosal swelling of the right ethmoid and maxillary sinus. 2. (A) intraoperative endoscopic finding of bright tumor tissue (#) in the right nasal cavity (UM=inferior turbinate, SP=septum). (B) endoscopic view of the tumor stalk (#) located at the nasal septum (SP) after complete resection. (MM=middle turbinate, …=epipharynx).