Jan G. Waldenström

Jan Gösta Waldenström (17 April 1906 – 1 December 1996) was a Swedish doctor of internal medicine, who first described the disease which bears his name, Waldenström's macroglobulinemia.

He was born in , and arose from a medical family: his father, Johann Henning Waldenström (1877-1972) was a professor of orthopedic surgery in Stockholm, and his grandfather, Johan Anton Waldenström (1839-1879) was professor of internal medicine in Uppsala.

Waldenström obtained his M.D. degree at the University of Uppsala, and studied organic chemistry with Hans Fischer at the Technical University of Munich. He was professor of theoretical medicine at the University of Uppsala in 1941, and became professor of practical medicine at the University of Lund in 1944. He was the head of the Department of Medicine at Malmö General Hospital until his retirement in 1972.

Waldenström first described, in 1944, patients suffering from a disease that has subsequently been named for him, Waldenstrom's macroglobulinema, a "hyperviscosity syndrome" in which symptoms are caused by abnormal lymphocytes which prevent normal bone marrow function, causing anemia and hepatosplenomegaly, and which secrete large immunoglobulins, causing bleeding difficulties.

Waldenström's other clinical investigations included studies on the various porphyrias, on the benign hypergammaglobulinemic purpura of Waldenström, on chonic active hepatitis, pulmonary hemosidersosis, on Bruton's hypogammaglobulinemia, paraneoplastic phenomena, and on carcinoid syndrome. He originated the concept of classification of gammopathies as "monoclonal gammopahies" vs. "polyclonal gammopathies" in 1961.

He was a member of the National Academy of Science in the United States, the French Academy of Sciences, and was an honorary member of the Royal Society of Medicine, London.

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