New MRI scan could predict kidney cancer aggressiveness without a biopsy

This study tests a new type of MRI that uses a natural substance (pyruvate) to see how active a kidney tumor is. The goal is to find out if the scan can tell the difference between harmless tumors, slow-growing cancers, and fast-growing cancers without needing a needle biopsy. About 54 adults with kidney tumors will get the scan, and doctors will compare the results with the tumor tissue after surgery or biopsy. If successful, this could help patients and doctors choose the best treatment—like monitoring versus surgery—based on how aggressive the tumor really is.