Dr. Jerome W. Conn, delineator of primary aldosteronism, was born in New York City on 24 September 1907 and died in Naples, Florida on 11 June 1994.

A graduate of Rutgers University (1928), Dr. Conn received his MD from the University of Michigan Medical School in 1932 and was associated with the University for the duration of his career. He was the Director of the Division of Endocrinology and Metabolism from 1943 to 1973 and Professor of Internal Medicine since 1950.

Dr. Conn's greatest contribution to medicine was the description in 1954 of the new entity called primary aldosteronism (later named the Conn syndrome). Caused by an adrenal tumor secreting excessive amounts of the adrenal hormone aldosterone, this disorder is one of the few serious hypertensive diseases that can be cured completely by the surgical removal of the adrenal tumor if it is recognized early enough. He subsequently devised new diagnostic techniques for its early detection. Between 1955 and 1975, the University Hospital was a worldwide center for study and treatment of patients with primary aldosteronism and related conditions.

He also pioneered in studies exploring the physiology of the pituitary-adrenal system, the mechanism of acclimatization to heat, and the physiology and pathophysiology of the renin-angiotensin-aldosterone system in humans. He contributed significantly to the knowledge of many aspects of diabetes and spontaneous hypoglycemia.

Dr. Conn served as President of the Central Society for Clinical Research and the American Diabetes Association. He was elected to membership in the National Academy of Sciences of the United States of America and became a charter member of the Institute of Medicine of the National Academy of Sciences. Other honors included the Banting Medal of the American Diabetes Association; the John Phillips Memorial Award and Mastership of the American College of Physicians; Honorary Fellowship in the American College of Surgeons; an honorary Doctor of Science Degree from Rutgers University; an honorary Doctor of Medicine Degree from the University of Turin, Italy; the Claude Bernard Medal from the Institute of Experimental Medicine and Surgery at the University of Montreal; the International Prize of the Gairdner Foundation, Toronto, Canada; and the International Stouffer Prize and Gold Medal for Research in Hypertension.

Dr. Conn's death was preceded by that of his wife, Elizabeth Stern Conn. He is survived by a daughter, Yvonne Muller of Durham, North Carolina; a son, William Conn of Ann Arbor, Michigan; a granddaughter, Nicole Muller of New York City; and a brother, Harold Conn of New Haven, Connecticut.