MALIGNANT FIBROUS HISTIOCYTOMA IN A 9-YEAR-OLD GIRL

A case of malignant fibrous histiocytoma in the left temporoparietal r egion of a 9-year-old girl is reported, The tumor was cystic with a mu ral nodule. Microscopically, the tumor focally infiltrated the leptome ninges sparing the dura mater, and was composed of glial fibrillary ac idic protein-negative cells suspended in a rich meshwork of reticulin fibers. Electron microscopy showed the presence of extensive thin proc esses on the cell's surface and lysosomal-like inclusions in the cytop lasm. No basal lamina was present around the cells. The clinical and p athologic features of this case were compared with those of previous c ases described in the world literature.