[Marrow involvement in malignant histiocytosis. Apropos of the first 2 Moroccan cases]

The clinical records and bone marrow cytology from two cases of malignant histiocytosis (MH) have been reviewed. Bone marrow films provide the diagnosis in the two patients. The infiltration of the marrow by neoplastic cell could only be identified in 50% of cases reported in the literature.