Prior treatments with radiotherapy or local ablative therapies are allowed if these therapies do not affect the measurable target lesions being used for the purposes of this protocol. Completion of any radiotherapy must be greater than or equal to 4 weeks prior to study entry, and/or resolution of all acute toxic effects of any prior radiotherapy or major surgical procedure to National Cancer Institute (NCI) Common Toxicity Criteria (CTC) grade less than or equal to 1
Evidence of unidimensionally measurable disease (ie, greater than or equal to 1 malignant tumor mass that may be accurately measured in at least 1 dimension greater than or equal to 20 mm with conventional radiographic techniques or magnetic resonance imaging \[MRI\], or greater than or equal to 10 mm with spiral computerized tomography \[CT\] scan). Tumor evaluation by positron emission tomography (PET) scan or by ultrasound may not substitute for CT or MRI scans. Bone lesions, ascites, peritoneal carcinomatosis or miliary lesions, pleural or pericardial effusions, lymphangitis of the skin or lung, cystic lesions, or irradiated lesions, and disease documented by indirect evidence only (eg, by laboratory tests such as alkaline phosphatase) are not considered measurable