Intrathecal Busulfan in Treating Patients With Recurrent, Refractory, or Metastatic Leptomeningeal Tumors [clinicaltrials:NCT00003462]

Intrathecal Busulfan in Treating Patients With Recurrent, Refractory, or Metastatic Leptomeningeal Tumors [clinicaltrials:NCT00003462]