.chemotherapeutic agents (methotrexate or zidovudin AZT or phenytoin)
.hypothyroidism
-Normocytic (normal MCV) , most forms :
.hemolysis
.aplastic anemia
-Hemolytic Anemia (Hymolysis) :
.Hereditary spherocytosis
.Hereditary elliptocytosis
.Thalassemia
.Sickle cell anemia
.Glucose-6-phosphate deficiency
-Death from anemia is most often from decreased oxygen delivery to the heart,resulting in the development of myocardial ischemia
-Anemia is considered when RBCs count :
.< 4.5 million in males
.< 3.9 million in females
Or Hemoglobin ( Hb ) content :
.< 13.5 gm % in males
.< 11.5 gm % in females
**MICROCYTIC ANEMIA
Iron Deficiency Anemia
-Is defined as a decrease in the amount of red blood cells (RBCs) or hemoglobin in the blood due to not enough iron
-Is the commonest type of anemia in Jordan / The average daily iron intake is 10-20 mg / Iron absorbed in duodenum / Alcohol increases iron absorption (tea drink are NOT) / Ferrous iron absorbed better than ferric
-Causes :
.poor diet may cause IDA in babies or children
.malabsorption (coeliac disease)
.Pregnancy
.iron absorption
.blood loss
.parasitosis
-Symptoms :
.High iron binding capacity
.Low serum ferritin
.Missed menstrual cycle
.Glossitis
.Angular cheilitis (inflammatory lesions at the mouth's corners)
.Koilonychia (spoon-shaped nails) or nails that are weak or brittle
.Pruritus (itchiness)
.Insomnia
.Restless legs syndrome
-Treatment of iron deficient anemia is (Elemental iron is mandatory at a dose of 4-6 mg/kg/day orally)
Anemia Of Chronic Disease
-This is associated with many disease , including chronic infection (TB,osteomyelitis),vasculitis,rheumatoid arthritis,malignancy,renal failure. It can be either microcytic or normocytic.
-The serum ferritin level is normal or elevated
-The serum iron level and total iron binding capacity TIBC are both low & reticulocyte count is low
Sideroblastic Anemia
-Is a form of anemia in which the bone marrow produces ringed sideroblasts rather than healthy red blood cells (erythrocytes)
-The ferritin level is elevated
-The serum iron level is high and TIBC total is low
-Causes :
.alcohol use (M.C.C of sideroblastic anemia)
.pyridoxine deficiency, lead poisoning
.myelodysplastic syndromes (MDS)
.Genetic syndromes
-Symtpoms :
.skin paleness
.fatigue, dizziness
.enlarged spleen and liver
.Heart disease, liver damage
.kidney failure can result from iron buildup in these organ
Thalassemia
-Is a form of inherited autosomal recessive blood disorder characterized by abnormal formation of hemoglobin. The abnormal hemoglobin formed results in improper oxygen transport and destruction of red blood cells / Thalassemia are not acquired anemia
-Features :
.Bone marrow hyperplasia
.Hair on end appearance
.Hypochromic microcytic RBCs
.Splenomegaly
.Hemolytic anemia resulting from imbalance of alpha and beta globin chains
.Patient becomes symptomatic in the second 6 months
.Facial deformities are present from expansion of the bone marrow
.Hypochromic microcytic anemia
-Treatment of thalassemia syndromes :
.Transfusion is unnecessary if the hemoglobin remains above 10 g/dl
+Beta-thalassemia trait (minor) :
.Mild anemia is usually present
.Peripheral smear is usually abnormal
.Mean corpuscular volume is usually low
.Hemoglobin A2 is usually elevated
.Beta-thalassemia (major) usually manifests at the age of (8 months)
.Skull X-ray show "hair on end" appearance
.Blood film shows hypochromic and microcytic picture