????? ??? ??, ?? ??? ??? ??? ? ?? ?? ??????. ???? ???? ??? ? ?? ?? ??? ?????.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.A variant of ependymoma, frequently found in the spinal cord, with tumor cells arranged in fascicles of variable width and mobile density.By adolescence, all folks with MLIV have severe visual impairment. A neurod