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IgE‐producing low‐grade non‐Hodgkin lymphoma

An unusual case of IgE‐producing non‐Hodgkin lymphoma (NHL) is presented. The patient's history included a 6‐year period of increasing IgE level before a low grade NHL was diagnosed. The patient developed lymph node, skin, bone marrow and lung infiltrations. With a cytostatic combination therapy a temporary improvement was achieved, but the patient died from progressive disease after 2 yr. The morphological appearance of the tumour varied between that of LP immunocytoma and a centrocytic lymphoma. Immunophenotype studies showed intracytoplasmic IgE lambda in tumour cells and B‐cell surface phenotype (BB‐1 pos; OKT 10 pos; PCA weakly pos and SIgE lambda).