“…Leptomeningeal seeding of high‐grade infiltrating gliomas, although uncommon in the past, has become increasingly evident in recent years with overall improved survival . High‐grade infiltrating gliomas, including anaplastic astrocytomas (World Health Organization [WHO] grade III), anaplastic oligodendroglioma (WHO grade III), and glioblastomas (WHO grade IV), were the second most common primary CNS tumors with positive CSF cytology noted in the current study.…”