Dr. Harvey Williams Cushing (April 8, 1869 - October 7, 1939) was a neurosurgeon who pioneered many techniques of neurosurgery. Cushing's Disease gets its name from him because he discovered a malfunction of the pituitary gland which he termed "polyglandular syndrome." He published his findings in 1932 as "The Basophil Adenomas of the Pituitary Body and Their Clinical Manifestations: pituitary Basophilism".
Dr. Ashley B. Grossman has published an excellent "Case Report" about Dr. Cushing, "Harvey Cushing and Cushing's Syndrome". His modern take on the early diagnosis and treatment is very interesting.