[Angioimmunoblastic lymphadenopathy. Evolution into malignant lymphoma (author's transl)].

In the last years angioimmunoblastic lymphadenopathy (AIL) was interpreted mainly as a benign reactive lymphnode disease. Recently, the reports about a progression into malignant lymphomas have become more numerous. We present a case of a 74-years-old woman which was diagnosed as lymphogranulomatosis X at first. Four weeks later criteria of malignancy were evident. 7 months after beginning of the disease the patient died. Histological, cytochemical, cytophotometrical, electron microscopical and immunological findings are reported. With regard to the diagnosis AIL it must be kept in mind that an evolution into malignant lymphoma is not infrequent. Hereby obviously a variable differentiation can be expected.