Eosinophilic granuloma of bone and biochemical demonstration of 49‐kDa CD1a molecule expression by Langerhans‐cell histiocytosis

Histiocytic cells infiltrating the lesions in eosinophilic granuloma of bone as well as in cutaneous histiocytosis X were studied using a murine monoclonal antibody (MA) produced with proliferating cells from an eosinophilic granuloma of bone. This MA reacts with Langerhans cells (LC) of normal human skin or mucous membranes and with proliferating cells of eosinophilic granuloma of bone and skin lesions of Letterer‐Siwe disease, as shown by immunohistochemistry and immunogold labelling.

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