[Malignant lymphomas of the mantle zone]

A series of mantle zone malignant lymphomas rendered ideas about their common features. Patients of higher age prevailed, prognosis was favourable even up to a steady state. Small cell blastic (centrocytoid) malignant lymphoma of the mantle zone (in lymphnodes, spleen, skin, parotid gland) tended to produce lymphoepithelial lesions, angioinvasion, and especially to spread into sinuses which did not influence prognosis in a positive way. B monocytoid medium cell malignant lymphoma (in lymphnodes, stomach, skin) was closer to classic malignant lymphomas in its behaviour but varied localization and usual mixed cytology produced rather controversial pictures. Independence of further variants (plasmacytoid, clear celled) was doubtful. Nevertheless, to be familiar with them was useful for their identification in mixed cytology variants which were very frequent. Relation of clear cell lymphomas to hairy cell leukaemias and independence of so called paracortex mixed malignant lymphoma as well as reticulohistiocytic malignant lymphoma was discussed.