Red blood cells (RBCs) are crucial for oxygen transport, but changes in their shape and size can indicate underlying diseases. A peripheral blood smear helps identify these abnormalities, aiding in the diagnosis of various anemias, liver disorders, and hematological conditions.
RBC Morphologies & Their Clinical Significance
Macrocytic RBCs – Enlarged RBCs seen in:
Vitamin B12 or folate deficiency Liver disease MDS (Myelodysplastic syndrome) Microcytic RBCs – Small RBCs linked to: Iron deficiency anemia Thalassemia Chronic disease anemia
Spherocytes – Round RBCs with no central pallor found in: Hereditary spherocytosis Autoimmune hemolytic anemia
Stomatocytes – RBCs with a slit-like central pallor seen in: Hereditary stomatocytosis Liver disease
Elliptocytes – Oval-shaped RBCs associated with: Hereditary elliptocytosis Severe iron deficiency anemia
Schistocytes – Fragmented RBCs indicating: Microangiopathic hemolytic anemia Mechanical valve-induced hemolysis
Target Cells – Bullseye-shaped RBCs seen in: Thalassemia & Hemoglobinopathies Liver disease
Bite Cells – Damaged RBCs due to: G6PD deficiency Oxidative stress (e.g., from drugs, unstable hemoglobin disorders)
Sickle Cells – Crescent-shaped RBCs found in: Sickle cell anemia S-beta thalassemia
Tear Drop Cells – Distorted RBCs linked to: Myelofibrosis Bone marrow infiltrates
Acanthocytes (Spurr Cells) – Spiky RBCs seen in: Abetalipoproteinemia Liver disease Post-splenectomy
Echinocytes (Burr Cells) – Spiked RBCs caused by: Uremia Liver disease
Hemoglobin C Crystals – Rod-shaped crystals seen in: Hemoglobin C disease & SC disease
Rouleaux Formation – Stacked RBCs found in: Multiple myeloma, lymphoma Chronic inflammatory diseases
RBC Agglutination – Clumped RBCs seen in: Cold autoimmune hemolytic anemia Paroxysmal cold hemoglobinuria
Why Does This Matter?
RBC morphology can provide early clues to systemic diseases. Essential for diagnosing anemia, hemolysis, and bone marrow disorders. A key tool in hematology, oncology, and transfusion medicine.
Reference: https://www.linkedin.com/posts/akanksha-kshirsagar-a05760346_hematology-rbcmorphology-anemia-activity-7301639874758037504-Ai_Q/?utm_source=share&utm_medium=member_ios&rcm=ACoAADUYKSkBX2GkEqxcuZW4TLku99jKP02MA8Y
