 If any nasal polyps obstructing ventilation or drainage are present, they are also removed.In the case of paranasal sinus/nasal cavity tumors (benign or cancerous), an otolaryngologist can perform FESS to remove the growths, sometimes with the help of a neurosurgeon, depending on the extent of the tumor.In some cases, a graft of bone or skin is placed by FESS to repair damages by the tumor.