[Lymphoproliferative lung lesions (pseudolymphoma--malignant lymphoma]

The authors report on the cases of five patients who suffered from primary pulmonary lymphoproliferative disease. Of 4 pseudolymphoma cases 3 were free of symptoms and complaints. One patient was operated on 14 years earlier and suffered also from associated Sjögren's syndrome. In this case the monoclonal immune globulin containing cell groups found earlier in the lymph node referred to the possibility of chronic dysproteinemia and to the transformation into malignant lymphoma of the hepato-splenomegaly. The contralateral pulmonary recurrence following the lung resection of a patient with malignant lymphoma was successfully treated with telecobalt irradiation. In connection with the literature and their cases the authors discuss the problems of differential diagnostics, therapy and prognosis as well.