[RECIST classifications : our experience at a university hospital]

Since the WHO [World Health Organization]'s criteria published in 1981, many organizations and research teams worked on revising and defining criteria for response monitoring of solid tumors. The RECIST criteria in 2000 and its revised version in 2009 introduced major changes in selecting lesions to be assessed and measuring them, and determining treatment response. While treatments are becoming more specific with the emergence of targeted therapies, response criteria are becoming more diversified and specialized with a type of tumor or/and treatment. This review describes the evolution of response criteria methods and sketches our experience in this field in Lebanon