Combined immunodeficiency due to CD70 deficiency

A rare autosomal recessive primary immunodeficiency characterized by susceptibility to Epstein-Barr virus (EBV)-related disorders (B-cell lymphoproliferative disorders including Hodgkin lymphoma) as well as dysgammaglobulinemia and recurrent infections. Patients can present with recurrent fever, lymphadenopathy, hepatosplenomegaly, Behçet-like stomatitis, pharyngitis, tonsillitis, adenitis, and viral encephalitis.