Keen, William (Williams)

(born Jan. 19, 1837, Philadelphia, Pa., U.S.—died June 7, 1932, Philadelphia) First U.S. brain surgeon. He received his M.D. from Jefferson Medical College. He was one of the first to successfully remove a brain tumour (1888) and assisted in the removal of Pres. Grover Cleveland's left upper jaw (1893), which contained a malignant tumour. In addition to his teaching and medical work, he edited Surgery: Its Principles and Practice (8 vol., 1906–13).

Source: Encyclopedia Britannica