[Fibrosarcoma arising in anaplastic astrocytoma of the brain (author's transl)].
D001254:Astrocytoma / Q000473:pathology*; D001932:Brain Neoplasms / Q000473:pathology*; D005354:Fibrosarcoma / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged