title: Comparison of RECIST 1.0 and RECIST 1.1 in Patients with Metastatic Cancer: A Pooled Analysis.
abstract: BACKGROUND
  We conducted this pooled analysis to investigate the impact of RECIST 1.1 on the selection of target lesions and classification of tumor response, in comparison with RECIST 1.0. Methods : We searched MEDLINE and EMBASE for articles with terms of RECIST 1.0 or RECIST 1.1. We looked into all abstracts and virtual meeting presentations from the conferences of ASCO and ESMO between 2009 and 2013.
  
  
  RESULTS
  There were six articles in the literature comparing the clinical impacts of RECIST 1.0 and RECIST 1.1 in patients with metastatic cancer. A total of 359 patients were recruited from the six trials; 217 with non-small cell lung cancer, 61 with gastric cancer, 58 with colorectal cancer, and 23 with thyroid cancer. The number of target lesions by RECIST 1.1 was significantly lower than that by RECIST 1.0 (P<0.001). Because of new lymph node criteria, fourteen patients (3.1%) had no target lesions when adopting RECIST 1.1. RECIST 1.1 showed high concordance with RECIST 1.0 in the assessment of tumor responses (k = 0.903). Sixteen patients (4.8%) showed disagreement between the two criteria.
  
  
  CONCLUSIONS
  This pooled study demonstrated that RECIST 1.1 showed a highly concordant response assessment with RECIST 1.0 in patients with metastatic cancer.
authors.affiliation: 1. Department of Internal Medicine, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 150-950, Republic of Korea.
authors.forename: Jung Han
authors.initials: JH
authors.lastname: Kim
authors.affiliation: 2. Department of Radiology, Dongtan Sacred Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Hwasung 445-907, Republic of Korea.
authors.forename: Seon Jeong
authors.initials: SJ
authors.lastname: Min
authors.affiliation: 3. Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Hwasung 445-907, Republic of Korea.
authors.forename: Hyun Joo
authors.initials: HJ
authors.lastname: Jang
authors.affiliation: 4. Department of Surgery, Hallym University Sacred Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Anyang 431-070, Republic of Korea.
authors.forename: Ji Woong
authors.initials: JW
authors.lastname: Cho
authors.affiliation: 1. Department of Internal Medicine, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 150-950, Republic of Korea.
authors.forename: Soo Ho
authors.initials: SH
authors.lastname: Kim
authors.affiliation: 1. Department of Internal Medicine, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 150-950, Republic of Korea.
authors.forename: Hyeong Su
authors.initials: HS
authors.lastname: Kim
keywords: RECIST 1.0; RECIST 1.1; Target lesion; Tumor response