Primary acquired hypogammaglobulinemia and regional enteritis.

We had a patient with primary acquired hypogammaglobulinemia (PAH), nodular lymphoid hyperplasia, giardiasis, and the subsequent development of regional enteritis (RE). The case is of interest because the development of regional enteritis in a patient with PAH has not been previously reported, to our knowledge. The interaction of hypogammaglobulinemia and RE is discussed from an immunologic point of view. The report adds RE to the many known bowel diseases associated with PAH.