RECIST

RECIST (Response Evaluation Criteria In Solid Tumors) is a standardized method used by doctors to measure how well a cancer treatment is working. It involves taking detailed scans of a tumor and measuring its size. If the tumor shrinks significantly, it's considered a positive response; if it grows or new tumors appear, it indicates disease progression. This system helps clinicians objectively assess and compare treatment effectiveness across patients and studies, guiding decisions about ongoing or future therapies. Simply put, RECIST provides a consistent way to track changes in tumors to evaluate how well a patient is responding to treatment.