- Symptomatic metastatic brain or meningeal tumors unless the subject is > 6 months from definitive therapy, has a negative imaging study within 4 weeks prior to study entry and is clinically stable with respect to the tumor at the time of study entry. Also the subject must not be undergoing acute steroid therapy or taper (chronic steroid therapy is acceptable provided that the dose is stable for one month prior to and following screening radiographic studies)