malignant schwannoma associated with von recklinghausen 's disease was indicated by the cellularity of the tumor , intersecting bundles of spindle cells , alternating cellular and less cellular myxoid areas in the peripheral portion of the tumor , whereas a large part of the tumor had a hemangiopericytoma-like arrangement with gaping blood vessels .
C0751690
malignant schwannoma
C0027831
von recklinghausen 's disease