[Morphological and immuno-cytological classification of secretory immunoglobulin producing malignant lymphomas...

After an introduction about the frequency of "secretory" immunoglobulin producing malignant lymphomas and the histological equivalent of intracytoplasmatic immunoglobulin the results of a co-operative retrospective study on 102 cases of immunocytoma and 28 cases of immunoblastoma are discussed. According to the different types of physiological plasma cell reaction lymphoplasmacytoid immunocytoma might be functionally interpreted as "parafollicular" immunocytoma, whereas lymphoplasmacytic and polymorphous immunocytoma might be functionally considered as a "transfollicular" one. These subtypes of the immunocytoma show differences in morphology, immunocytology, primary localization and occurrence of leukemia.