5. At least one measurable disease site defined by RECIST criteria, with measurement made within 30 days of beginning study therapy. (Non-measurable disease includes bone lesions, leptomeningeal disease, ascites, pleural/pericardial effusion, inflammatory breast disease, lymphangitis cutis/pulmonis, abdominal masses that are not confirmed and followed by imaging techniques, and cystic lesions. For lesions in a previously irradiated field, the radiated lesion cannot be assessed as a measurable lesion unless growth of that lesion has been documented after radiation).