I think this is a meningeal tumor with solid, microcystic and pseudopapillary parts which are composed of spindle-shaped eosinophilic cells, atypical cells and giant cells. The morphology is in my view compatible with a papillary meningioma (WHO G3) as a rare variant of meningiomas with brain invasion and an unfavorable prognosis.

Thanks ! I try to do vimentin and come back.

I agree that the images look most like a meningioma, parts of which have a papillary architecture. I can't resolve the morphology well enough to see whether or not the tumour is mitotically active, as I'd expect of a papillary meningioma. IHC for EMA may be helpful (usually membrane labelling of meningiomas and dot-like cytoplasmic labelling of ependymomas) and I'd expect this not to contain GFAP, whereas ependymomas almost always expres this antigen.