Anemia (also spelled anaemia) is a decrease in the total amount of red blood cells (RBCs) or hemoglobin in the blood, or a lowered ability of the blood to carry oxygen. When anemia comes on slowly, the symptoms are often vague and may include feeling tired, weakness, shortness of breath, and a poor ability to exercise. [Source: Wikipedia ]

Primary anemia
May Cause
Cardiomegaly in childhood
Congenital generalized osteoporosis
Congenital splenomegaly
Delayed bone age
Dense or thick skull
Diffuse demineralization of skull
Diffusely dense calvarium
Focally dense calvarium
Frontal bossing
Generalized osteopenia or osteolysis of the jaws
Generalized osteoporosis
Heart failure in childhood
High-output heart function
Intermediate T1 intensity diffuse vertebral body abnormality
Ischemic heart disease
Large main pulmonary artery
Left ventricular enlargement
Loss of inner cortical bone margin
Loss of lamina dura of teeth
Multiple collapsed vertebrae
Multiple expanding rib lesions
Pericardial effusion
Small thymus in an infant
Spinal osteopenia
Thick ribs
Thick tubular hand bones
Wide diametaphysis
Widespread cortical bone thinning
May Be Caused by
Aarskog syndrome
Aase syndrome
Aluminum intoxication
Banti syndrome
Blind loop syndrome
Celiac disease
Central nervous system calcification - deafness - tubular acidosis - anemia
Chédiak-Higashi syndrome
Congenital dyserythropoietic anemia
Copper deficiency
Cronkhite-Canada syndrome
Diamond-Blackfan syndrome
Diaphyseal dysplasia Ghosal hemato type
Diverticulosis of jejunum-macrocytic anemia-steatorrhea syndrome
Dubowitz syndrome
Dyskeratosis congenita
Evans syndrome
Fabry syndrome
Fanconi anemia
Felty syndrome
G6PD deficiency
Gastrointestinal system bleeding
Goodpasture syndrome
Hemoglobin C disease
Hemolytic-uremic syndrome
Hereditary nonspherocytic anemia
Hereditary sideroblastic anemia
Holt-Oram syndrome
Hypereosinophilic syndrome
Hyperostosis-hyperphosphatemia syndrome
Hyperphosphatasia-erythroblastopenia of childhood
Hyperuricemia - anemia - renal failure
Idiopathic pulmonary hemosiderosis
Imerslund-Gräsbeck syndrome
Infantile multisystem inflammatory disease
Iron deficiency anemia
Jervell and Lange-Nielsen syndrome
Kenny-Caffey syndrome
Langerhans cell histiocytosis
Lead intoxication
Lowe syndrome
Macrocephaly - immune deficiency - anemia
Ménétrier disease
Metaphyseal chondrodysplasia McKusick type
Metaphyseal chondrodysplasia Shwachman type
Mixed connective tissue disease
Mixed sclerosing bone dysplasia
Myelodysplastic syndrome
Niemann-Pick disease
Ovarian dermoid cyst-autoimmune hemolytic anemia syndrome
Pancreatic insufficiency - anemia - hyperostosis
Paraneoplastic syndrome
Paroxysmal nocturnal hemoglobinuria
Pearson syndrome
Peutz-Jeghers syndrome
Plummer-Vinson syndrome
Polyglandular autoimmune disease
Prasad syndrome
Pyruvate kinase deficiency
Retinopathy - anemia- central nervous system anomalies
Révész syndrome
Sea-blue histiocyte syndrome
Sickle cell disease
Spondyloepiphyseal dysplasia tarda
Stagnant small-bowel syndrome
TAR syndrome
Thrombotic thrombocytopenic purpura
Transcobalamin II deficiency
Trichorhinophalangeal dysplasia type 2
Tyrosinemia type 1
Vitamin A deficiency
Vitamin B12 deficiency
Waldenström syndrome
Wegener granulomatosis
Weismann-Netter syndrome
Wilson disease
Wiskott-Aldrich syndrome
WT limb-blood syndrome
X-linked lymphoproliferative disease
Zieve syndrome