C (Cyril) Rollins "Rollo" Hanlon, MD, FACS (February 8, 1915 – May 3, 2011)[1] was an American pioneering cardiac surgeon.
[2] He received his MD from Johns Hopkins where he interned.
In 1950, he became Chairman of Surgery at St. Louis University.
In 1956, while at St. Louis University Hanlon led a 12-person team in performing the first open heart surgery in the state of Missouri[3] or the lower Midwest region of the United States.
He served in the U.S. Navy in the China-Burma-India Theater and aboard the hospital ship Repose.