| A rare autosomal recessive primary immunodeficiency characterized by susceptibility to Epstein-Barr virus (EBV)-associated lymphoproliferative disorders such as malignant B-cell proliferation, Hodgkin lymphoma, B-cell lymphoma, lymphoid granulomatosis, hemophagocytic lymphohistiocytosis and smooth muscle tumor. Patients present with persistent symptoms of infectious mononucleosis including recurrent febrile episodes, lymphadenopathy and hepatosplenomegaly accompanied by a high EBV viral load in the blood. Additional manifestations are autoimmune diseases like hemolytic anemia or renal disease. |