[Primary immunodeficiencies and malignant proliferations (author's transl)].

The occurrence of malignant proliferative diseases in patients with primary immune deficiencies is far more frequent than in normal individuals. These malignant proliferations may supervent in all types of immune deficiencies but are more frequent in the Wiskott-Aldrich syndrom, ataxia telangiectasia and variable immunodeficiencies. The incidence of malignant lymphomas is striking since they account for two thirds of the malignancies. This fact does not support the hypothesis of a faulty immunological surveillance and would be in accordance with the hypothesis of a direct role of antigenic stimulations occurring on an immune system devoid of regulatory mechanisms.