The Working formulation is an obsolete classification of non-Hodgkin lymphomas, first proposed in 1982. It has since been replaced by other lymphoma classifications, the latest published by the WHO in 2008, but is still used by cancer agencies for compilation of lymphoma statistics.
Low Grade
Malignant lymphoma, small lymphocytic (chronic lymphocytic leukemia)Malignant lymphoma, follicular, predominantly small cleaved cellMalignant lymphoma, follicular, mixed (small cleaved and large cell)Intermediate grade
Malignant lymphoma, follicular, predominantly large cellMalignant lymphoma, diffuse, small cleaved cellMalignant lymphoma, diffuse, mixed small and large cellMalignant lymphoma, diffuse, large cellHigh grade
Malignant lymphoma, large cell, immunoblasticMalignant lymphoma, lymphoblasticMalignant lymphoma, small noncleaved cells (Burkitt lymphoma)Miscellaneous
CompositeMycosis fungoidesHistiocyticExtramedullary plasmacytomaUnclassifiable