Immunoelectronmicroscopic investigation of Hodgkin's disease with monoclonal antibodies against histiocytes.

8 cases of Hodgkin's disease (HD nodular sclerosis (n = 3), HD mixed type (n = 2), and nodular paragranuloma (n = 3] were investigated with monoclonal antibodies against histiocytes (Ki-M1, Ki-M3, Ki-M4, Ki-M6, and Ki-M7). Reactivity of H- and SR-cells with the monoclonal antibodies Ki-M3 and Ki-M7 could be shown at the ultrastructural level in cases of HD of nodular sclerosis and mixed type. In nodular paragranuloma no positive H-, SR- nor L & H-cells could be demonstrated. The reaction site of the monoclonal antibodies in H- and SR-cells was comparable to those in histiocytes.