Non-Hodgkin malignant lymphomas and Hodgkin's disease in first-degree relatives. Evidence for a mutual genetic predisposition?

The occurrence of malignant lymphomas in 3 siblings is described. The cases include the first report of Hodgkin's disease and non-Hodgkin malignant lymphoma in dizygotic twins. Another remarkable feature was the development of malignant lymphoma, when the siblings were at the same age. Although a transmissible agent or environmental factors cannot be excluded in this family, our observations may suggest a mutual genetic predisposition in Hodgkin's disease and non-Hodgkin malignant lymphoma.