Histiocytosis, Malignant

Histiocytic Medullary Reticulosis; Malignant Histiocytosis; Histiocytic Medullary Reticuloses; Histiocytoses, Malignant; Malignant Histiocytoses; Medullary Reticuloses, Histiocytic; Medullary Reticulosis, Histiocytic; Reticuloses, Histiocytic Medullary
A rare, usually rapidly progressive disorder, characterized by abrupt onset, fever, weight loss, hepato-splenomegaly, pancytopenia, and lymphadenopathy.