Angioimmunoblastic lymphadenopathy after infectious mononucleosis.

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Abstract
Angioimmunoblastic lymphadenopathy occurred in a 46-year-old man 16 months after an episode of infectious mononucleosis induced by Epstein-Barr (EB) virus. The features of infectious mononucleosis included fever, pharyngitis, lymph gland enlargement, hepatosplenomegaly, hyperbasophilic mononuclear cells, and IgM antibodies to EB virus, although heterophile antibodies were not detected. The illness was severe and prolonged and included an asymptomatic measles virus infection. Over a year later massive enlargement of the lymph nodes led to a biopsy, which showed a diffuse infiltration with lymphoid cells and a proliferation of arborising small vessels typical of angioimmunoblastic lymphadenopathy. In spite of corticosteroids, levamisole, chlorambucil, and radiotherapy, no remission occurred, and serious infections led to death 18 months after the onset. Viral infections with EB virus and measles virus associated with pre-existing or subsequent immunological changes probably resulted in the appearance of angioimmunoblastic lymphadenopathy.