Harvey William Cushing (1869-1933)
American physician and neurosurgeon

Cushing developed many of the basic surgical techniques for operating on the brain, thus establishing himself as one of the foremost leaders and experts of this field. Under his influence neurosurgery became an autonomous surgical discipline. His achievements included:  

Now his name is commonly associated with his most famous discovery - Cushing's disease (hyperadrenocorticism), first described in his work The Pituitary Body and its Disorders (1912). Cushing was also awarded the Pulitzer Prize in 1926 for a biography of one of the fathers of modern medicine - Sir William Osler.

Adapted from: en.wikipedia.org/wiki/Harvey_Cushing