[Comments on the WHO Reference Center classification of non-Hodgkin hematosarcomas]

The authors discuss the W.H.O. classification of neoplastic disorders of lymphatic and haematopoietic tissue proposed by G. Mathé and H. Rappaport. They note the points in common with previously published new classifications and make a number of remarks and criticisms. They stress the point most open to discussion: maintenance of the concept of reticulosarcoma. They propose the parallel use of several classifications, including the old nomenclature of Rappaport, in routine histopathology during the comming years.