Can Medulloblastoma be Presented with Primary Diffuse Leptomeningeal Gliomatosis? Case Report and Literature Review

Primary diffuse leptomeningeal Gliomatosis (PDLG) is a rare neoplastic condition characterized by primary infiltration of leptomeninges by malignant glial cells which is extremely rare to be as a result of medulloblastoma. To the best of our knowledge, there are only 5 reported localized forms of PDLG cases due to medulloblastoma affecting mainly posterior fossa and/or part of cerebrum. In this article, we are reporting for the first time a case of PDLG with extensive diffuse involvement of leptomeninges due to medulloblastoma extending from the cerebrum to sacral area in 4-year old child presented with acute headache, abducent nerve palsy and papilledema with dramatic response to chemotherapy.