Evaluation of CT in diagnosing meningioma in nasal cavity and paranasal sinus

Objective:To evaluate CT in the diagnosis of meningioma of nasal cavity and sinuses.Methods:CT findings of 4 cases with meningioma of nasal cavity and sinuses confirmed by operation and pathology were retrospectively analyzed.Results:Involvement of the lesions in this series was extensive,and appeared iso or hypodense,with peritumor osteosclerotic rim on plain CT.Of 3 cases,there was irregular,linear or patchy calcification and hypodense necrosis within the tumor.Nasal septum and sinuses were all involved and nasal septum appeared obviously displaced or destructed.Involvement of ethmoid and sphenoid sinuses was seen in 4 cases,and involvement of maxillary sinuses in 2 cases.The sinuses were expansively enlarged,and filled with heterogeneous densities.There was compression and thinning of the wall of sinuses but without osteolytic destruction.Conclusion:The meningiomas in nasal cavity and sinuses could be correctly diagnosed with CT scanning.