Desmoplastic Medulloblastoma

Higher magnification of one the paler tumor nodules showing a population of uniform round to oval cells in a pale pink fibrillary background. The cells have a more mature neuronal appearance and are less active mitotically. The surrounding darker tumor cells are more primitive appearing with brisk mitotic activity. Desmoplastic medulloblastoma has a better prognosis than the classic form. In some cases, the pale nodules of tumor are quite large and dominant with minimal internodular tumor. Such cases have been termed Medulloblastomas with Extensive Nodularity (see next image).