immunologic concepts have facilitated the recognition within the histiocytic lymphoma group of the rappaport classification of five diagnostic categories of lymphoma ( follicular center cell lymphoma large cleaved and large non-cleaved types , immunoblastic sarcoma b cell type , immunoblastic sarcoma t cell type and 'true histiocytic lymphoma ' ) .
C0004561
b cell type
C0079746
immunoblastic sarcoma