Depocyt® With Sorafenib in Neoplastic Meningitis

After an Ommaya reservoir has been placed in the patient's head, the patient will receive DepoCyt through that reservoir every 2 weeks for 5 doses, then every 4 weeks for an additional 5 doses (a total of 10 DepoCyt treatments). Patients will also receive oral sorafenib at 400 mg twice a day throughout the treatment course until disease progression or death. Patients will receive brain magnetic resonance imaging (MRIs) with contrast (and whole spine, if necessary) and spinal fluid studies will be obtained every 8 weeks through the Ommaya reservoir until disease progression, death, or unacceptable toxicity. In addition, patients will have spinal fluid obtained to test for sorafenib levels at each study visit after the start of sorafenib as well as prior to sorafenib treatment for controls.