[Olfactory meningioma with ethmoido-orbital extension. Diagnostic and therapeutic problems. Apropos of a case].

Our purpose is to present a case of olfactory meningioma with extensive invasion of the orbit and the ethmoid sinuses revealed by an exophthalmia. Diagnosis discussions with others tumors of the ethmoid sinuses are presented. Meningioma resection was realized simultaneously by ENT surgeons and neurosurgeons through a bifrontal coronal skin flap and orbital roof remaining. Anterior skull base reconstruction was performed with a madreporic coral graft, which is a simple, fast and reliable technique, permitting a complete skull base closure.