This study is designed to evaluate the ability of intravenously (IV)administered
131-I-labeled TM-601 (chlorotoxin) to provide tumor-specific localization(via radiographic
imaging) in patients with recurrent or refractory primary solid tumors with evidence of
metastatic involvement. (Refractory tumors are non-responsive to standard treatment.) The
safety and tolerability of IV administered 131-I-TM-601 in this patient population will be
evaluated as part of this study.