the presence of hla-dr ( + ) and okm1 ( + ) cells demonstrates that hf contain cells bearing antigenic characteristics of histiocytes but not of langerhans ' cells , and we feel that the term `` '' histiocytofibroma '' '' is a more accurate designation for these lesions than `` '' dermatofibroma '' '' .
C0019612
histiocytes
C0002991
`` '' dermatofibr