- Patients must have histologically or cytologically confirmed solid tumor or lymphoma that is metastatic or unresectable and for which standard curative or palliative measures do not exist or are no longer effective; all solid and lymphoma tumor types are eligible; patients with a liver mass (radiologically evident), elevated alpha-fetoprotein level (>= 500 ng/mL), and positive serology for viral hepatitis or history of alcoholic cirrhosis consistent with a diagnosis of hepatocellular carcinoma will be eligible without the need for pathologic confirmation of the diagnosis