Response Evaluation Criteria in Solid Tumors Version 1.0

**Semantic type:** Intellectual Product

**Definition:** A standardized guideline developed by the Response Evaluation Criteria in Solid Tumors (RECIST) Working Group in 2000, which is an objective response criteria used to assess solid tumor response and to measure change in tumor size for use in adult and pediatric cancer clinical trials. RECIST version 1.0 contains the following key features: definitions of minimum size of measurable lesions, instructions on how many lesions to follow, and the use of uni-dimensional rather than bi-dimensional measures for evaluation of tumor burden.

**Synonyms:** - RECIST 1.0