On August 3, 2015, Carter underwent elective surgery to remove 'a small mass' on his liver, and his prognosis for a full recovery was initially said to be 'excellent'. On August 12, however, Carter announced he had been diagnosed with cancer that had metastasized, without specifying where the cancer had originated. On August 20, he disclosed that melanoma had been found in his brain and liver, and that he had begun treatment with the immunotherapy drug pembrolizumab and was about to start radiation therapy. His healthcare is being managed by Emory Healthcare of Atlanta. The former president has an extensive family history of cancer, including both of his parents and all three of his siblings. On December 6, 2015, Carter issued a statement that his medical scans no longer showed any cancer.