Linear IgA disease in a patient with Castleman's disease.

Linear IgA disease (LAD) is a well recognized subepidermal blistering disorder characterized by linear deposits of IgA at the basement membrane zone. The aetiology is unknown but there is a recognized association with lymphoproliferative malignancies. We report a case of LAD occurring in a patient with multicentric Castleman's disease (angiofollicular lymph node hyperplasia), an association not previously recorded in the literature.