The new interpretation of the classical clinical, histological and cytomorphological findings by means of modern methods has led to older ideas of cutaneous lymphoreticular neoplasias having to give way to newer concepts. Most of the earlier reticuloses are today to be considered as cutaneous B cell lymphomata. The rest are divided among cutaneous T cell lymphomata, leukemias and malignant histiocytic diseases. Lympohosarcomata are completely absorbed into the lymphoma concept, reticulosarcomata - as far as is known at present - are to be included partly among the giant cell blastic lymphomata and partly among diseases of the mononuclear phagocyte system. There appears no longer to be any place for a "reticulosis". The relatively large group of unclassified cutaneous lymphomata is perhaps a reminder to exercise care here.