Hemorrhage
Hereditary
Acquired
Microangiopathic Hemolytic Anemia (MAHA)
Autoimmune hemolytic anemia
Iron deficiency
Anemia of chronic disease
Thalassemia
Sideroblastic anemia
Marrow failure
Chemicals (e.g. ETOH)
Radiation
Infection (HIV, parvo)
Vitamin B12/folate deficiency
Drugs (chemo)
HIV<unk> 
Chondrosarcoma
Paget disease
Osteosarcoma
Adamantinoma
Chordoma
Primary bone lymphoma
Fibrosarcoma
Myosarcoma
Giant cell tumor
Chrondroblastoma
Enchondroma
Langerhans cell histiocytosis of bone
Osteoblastoma
Osteochondroma
Osteoid osteoma
Septic joint
Fracture
Abscess
Multiple myeloma
Hemorrhage
Myelofibrosis
Hereditary
Non-Hodgkin's lymphoma
Acquired
Chronic lymphocytic leukemia
Microangiopathic Hemolytic Anemia 