JPMorgan Chase CEO Jamie Dimon told his employees and shareholders Tuesday that he has curable throat cancer. In a note to staff, Dimon, 58, said, "The good news is that the prognosis from my doctors is excellent, the cancer was caught quickly, and my condition is curable." JPMorgan‘s board of directors has been briefed on his condition, which will likely call for about eight weeks of radiation and chemotherapy at Memorial Sloan Kettering in New York City, according to the note. The cancer is believed to be contained in Dimon‘s throat and lymph nodes on his right side. Dimon, often considered the most powerful CEO on Wall Street, has been CEO of the bank since December 2005, and added the chairman title in December 2006. While the prognosis for Dimon‘s recovery from throat cancer is good, the board does have a short, medium- and long-term succession plan in place, a source told CNBC.