FEBRUARY-1997 - 9-YEAR-OLD GIRL WITH HYDROCEPHALUS

A nine year old girl presented with nausea vomiting and hydrocephalus. Imaging studies demonstrated a large right thalamic mass with areas o f cystic change or necrosis. Sections of resected material showed peri vascular pseudorosettes, necrosis, endothelial proliferation, numerous mitoses, densely cellular areas and numerous fool with a clear-cell m orphology, This case is used to illustrate the features of anaplastic ependymomas and to discuss the relationship of the histologic features to prognosis.