A rare case of primary nasoethmoidal meningioma

A rare case of primary sinonasal meningioma: A case report

“…Primary extra cranial meningioma is rare, accounting for less than 1 % of cases [2] , [4] . Our study reports a case of primary sinonasal meningioma in an old man.…”

“…CT-scan or MIR is unable to identify the nature of the nasal cavity tumor, but it is essential in determining the location, size and it gives information of the extent and invasion of the tumor; compression and deformation can be observed in adjacent bones. Calcification is rare, but no specificity is present [2] , [4] .…”

“…WHO (World Health Organization) has classified meningioma into 3 grades; the typical or benign type (Grade I), the atypical with frequent mitosis (Grade II) and the anaplastic type with invasion (Grade III) [2] , [3] , [11] . Most of sinonasalmeningiomas are benign; local infiltration as well as distant metastasis may occur in malignant forms [2] .…”

“…Meningioma is a central nervous tumor that arises from the meninges [1] . Primary extracranial meningioma occurs relatively rarely in less than 1 %; the most common localizations are the skull bones as well as scalp, sinonasal tract, orbit and ear [1] , [2] , [3] . Meningioma involving the sinonasal tract may mimic nasal polyps.…”

“…Meningioma involving the sinonasal tract may mimic nasal polyps. The final diagnosis rests in histological and imunohistochemical examination [2] . The world health organization of the central nervous system tumors has classified these tumors into WHO types I, II, III and 15 subtypes [4] .…”