credence with the arrival of more sophisticated methods of identifying MAP bacteria. Crohn noted that it can be difficult for physicians to correctly differentiate neuroses from diseases of the organs. He said that all doctors will occasionally mistake diseases of the organs for neuroses or vice versa. For most of his long career, Crohn had a private practice in New York City and was associated chiefly with Mount Sinai Hospital. At Mount Sinai, he worked with the neurologist Bernard Sachs (1858–1944). He also spent time working with Jesse Shapiro, M.D., another doctor very involved with Crohn's research. As Dr. Shapiro had been diagnosed with Crohn's himself, he had a born devotion to curing the disease. Crohn soon built a very large and successful practice in gastroenterology, specializing in patients with inflammatory bowel disease, including Crohn's disease. He was elected president of the American Gastroenterological Association in 1932. He received numerous awards and professional honors, wrote extensively for doctors and the general public, and was asked to consult on high-profile patients from all over the US and abroad, including President Dwight D. Eisenhower in 1956. During his career, Crohn wrote three books, Affections of the Stomach (1927), Understand Your Ulcer (1943), and Regional Ileitis (1947, second edition 1958). He also wrote more than 100 articles for professional journals. When asked why he went into medicine, Crohn said he wanted to help his father, Theodore, who suffered from severe indigestion. Personal life Crohn married Lucile Pels in 1912, and had two children, Edward Crohn (1917-2013), a physician, and Ruth Crohn Dickler (1914-2016) a New York City resident, known for her philanthropy. They divorced in 1927. He later married Rose Blumenthal in 1948. In addition to practicing medicine, Crohn enjoyed painting and studying the history of the American Civil War. Crohn's watercolors were frequently displayed in galleries in New Milford, Connecticut. Crohn practiced medicine until he was 90, splitting time in his later years between the Upper East Side of Manhattan and a country home in New Milford, Connecticut. The Burrill B. Crohn Research Foundation was established at Mount Sinai in 1983 with initial funding from Rose Crohn and later his daughter, Ruth Crohn Dickler. Sources Crohn BB, Ginzburg L, Oppenheimer GD. Regional ileitis; a pathological and clinical entity. JAMA, 1932;99:1323-1329. References 1884 births 1983 deaths American Jews Columbia University Vagelos College of Physicians and Surgeons alumni American gastroenterologists People from the Upper