“…Many of the reported cases show gross and often well-demarcated endocardial fibrosis with overlying thrombus, and some of the cases of endocardial fibrosis or endomyocardial sclerosis reported from Europe and America do strikingly resemble endomyocardial fibrosis as seen in Uganda. Cardiac thrombi are common in these cases and embolic phenomena have occurred in about half of the cases described both in Europe (Lofier, 1936;Mumme, 1940;Edge, 1946;Gray, 1951;Hughes and Smith, 1953;Lynch and Watt, 1957;Penfold, 1957) and in the United States of America (Smith and Furth, 1943;Toreson, 1944;McKusick and Cochran, 1952;McNicol et al, 1953;Hoffman, Rosenbaum, and Genovese, 1955). The nature of this group of disorders is uncertain, and their inclusion in this discussion does not imply any etiological relation to endomyocardial fibrosis as seen in Africa, but is intended to indicate the relative frequency with which embolic phenomena complicate endomyocardial fibrosis and mural thrombosis in different populations.…”