Hello My Little Hang of Nasties 😜😈 If you are in need of a solid review of the major anemias, this resource covers the essentials; from pathophysiology to lab findings and morphology under the microscope. See below or click the .pdf attachment. Here’s a breakdown of the key highlights: 🔬 Iron Deficiency Anemia (IDA) - Cause: Inadequate iron → ↓ hemoglobin synthesis. - Labs: ↓ serum iron, ↓ ferritin, ↑ TIBC - Morphology: Microcytic, hypochromic RBCs - Notes: TIBC rises due to increased transferrin production in response to iron deficiency. 💥 Hemolytic Anemia - Cause: Premature RBC destruction—immune or non-immune mediated. - Labs: ↑ reticulocytes, ↑ LDH, ↑ indirect bilirubin, ↓ haptoglobin, (+) DAT (if immune-mediated) - Notes: Often associated with transfusion reactions, autoimmune hemolytic anemia, or certain infections/medications. 🧬 Sickle Cell Anemia - Cause: Mutation in the β-globin gene → Hgb S formation - Morphology: Sickle-shaped cells, target cells, anisopoikilocytosis - Labs: ↑ retic count, ↑ WBC/platelets, ↑ LDH/bilirubin, ↓ Haptoglobin - Genetics: Valine replaces glutamic acid at the 6th position of the β-globin chain. 🧪 Thalassemia - Cause: Decreased or absent synthesis of alpha or beta globin chains - Morphology: Microcytic, hypochromic RBCs; target cells; marked anisopoikilocytosis - Alpha Major: 4-gene deletion → hydrops fetalis - Beta Major: ↑ Hgb F and A2, ↓/absent Hgb A - Beta Minor: ↑ Hgb A2 - Diagnosis: Hemoglobin electrophoresis 🚫 Aplastic Anemia - Cause: Bone marrow failure (acquired or inherited e.g. Fanconi anemia) - Labs: Pancytopenia, ↓ retic count - Bone Marrow: Hypocellular marrow 🔴 Hereditary Spherocytosis - Cause: Defects in RBC membrane proteins - Morphology: Spherocytes - Labs: ↑ MCHC, (+) Osmotic Fragility Test 🧪 G6PD Deficiency - Cause: X-linked recessive enzyme deficiency → RBCs vulnerable to oxidative stress - Triggers: Fava beans, certain drugs/infections - Morphology: Bite cells, blister cells, Heinz bodies, polychromasia