• lymph nodes
  • The uncontrolled growth is nonmalignant and does not appear clonal in contrast to the lineage of cells in Langerhans cells histiocytosis ( histiocytosis X ). The spleen, lymph nodes, bone marrow, liver, skin, and membranes that surround the brain and spinal cord are preferential sites of involvement. (medscape.com)
  • multiple myeloma
  • Familial hemophagocytic syndrome Aplastic anemia Gaucher's disease metastatic carcinoma of bone Multiple Myeloma overwhelming infections Lymphoma myelofibrosis Dyskeratosis congenita Myelodysplastic syndrome Leukemia Leishmaniasis Severe Folate or vitamin B12 deficiency Systemic lupus erythematosus Paroxysmal nocturnal hemoglobinuria (blood test) Viral infections (such as HIV, EBV--undetermined virus is most common). (wikipedia.org)
  • Fever
  • The diagnosis is made by the identification of characteristic features of: Fever, hepatomegaly, cytopenias, hypertriglyceridemia or hypofibrogenemia, hemophagocytes in the marrow or other reticuloendothelial system organs, low or absent NK cell activity, a high ferritin level and a high soluble CD25 . (scidoc.org)