A California doctor with advanced cancer has undergone a rare transplant procedure at Northwestern Memorial Hospital in Chicago. The doctor received a new set of lungs and a liver, with some reports specifying that the cancer was lung cancer and others mentioning colorectal cancer that had spread to the liver. The transplant is being described as a first-of-its-kind or unprecedented procedure by some outlets, although the specifics of the cancer and the procedure are not universally agreed upon.