Intrathecal Gemcitabine to Treat Neoplastic Meningitis, IT Gemcitabine

"Schedule~Induction: At Dose Level 1athe first cohort of patients will receive intrathecal gemcitabine on a weekly basis for a total of 6 weeks. If that is tolerated, the subsequent cohort will receive intrathecal gemcitabine on a twice-weekly basis (Dose Level 1b) for a total of 6 weeks. Subsequent cohorts (Dose Levels 2 - 6) will receive intrathecal gemcitabine on a twice weekly basis for a total of 6 weeks (12 doses).~In the absence of disease progression or DLT, patients may proceed to consolidation.~Consolidation: Intrathecal gemcitabine will be administered weekly for a total of 6 doses. The first dose of consolidation will be given 1 week after the last induction dose. In the absence of disease progression or DLT, patients may proceed to maintenance.~Maintenance: Intrathecal gemcitabine will be given twice monthly for 4 months and monthly thereafter. In the absence of progressive disease or dose-limiting toxicity, the total duration of therapy will be 1 year."