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U.S. National Institutes of Health
Cancer Diagnosis Program Cancer Imaging Program Cancer Therapy Evaluation Program Developmental Therapeutics Program Radiation Research Program Translational Research Program Biometric Research Branch Office of Cancer Complementary and Alternative Medicine
Last Updated: 04/25/2012


Response Evaluation Criteria in Solid Tumors

In 2000, an international committee first promulgated unified, easily applicable criteria for measuring tumor response using X-ray, CT, and MRI which are known as Response Evaluation Criteria in Solid Tumors (RECIST). The technique is recommended but not mandatory for NCI-sponsored clinical trials and involves formalized rules for measurement of tumor target lesions. The latest version of the criteria, RECIST Guideline (Version 1.1), was published in 2009.