MIDDLE FOSSA FLORO MENINGIOMAS - REPORT O F 11 CASES, ANATOMICAL AND CLINICAL-STUDY

The authors present eleven cases of middle fossa floor meningiomas. Th ey describe the anatomical and clinical features of these tumors in th is rare localisation. They emphasize the strait anatomical relations w ith the cranial base, eight cases were inserted above the superior sur face of the petrous bone, two above the endocranial face of the horizo ntal part of the greater sphenoid wing, one above the horizontal part of the temporal squama. Headache (6 cases) and memory loss (4 cases) a re the most frequent clinical feature, seizures (2 cases) and neuropsy chologic troubles were probably undervalued. Auditory signs were prese nt in three cases. There was no visual defect and cranial nerve impair ment. They insist on the necessity to obtain a complete preoperative t emporal bone Cr scan exploration. They think that a well advised surgi cal act is sufficient for these meningiomas inserted above weak struct ures and with good prognosis: there's no recurrence in this study with a follow up from 12 to 132 months.