Response Evaluation Criteria in Solid Tumors (RECIST) Quick Reference:EligibilityOnly patients with measurable disease at baseline should be included in protocols where objective tumor response is the primary endpoint. Measurable disease - the presence of at least one measurable lesion. If the measurable disease is restricted to a solitary lesion, its neoplastic nature should be confirmed by cytology/histology. Measurable lesions - lesions that can be accurately measured in at least
