Which morphology is also called a Codocyte?

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Which morphology is also called a Codocyte?

Codocytes, also called target cells, have a distinctive bullseye appearance on the smear: a central concentration of hemoglobin, a surrounding pale zone, and a peripheral ring of hemoglobin. This shape results from an increased membrane-to-volume ratio, so the cell has more membrane relative to its cytoplasm. You’ll see this morphology in conditions that alter membrane content or cell volume, such as liver disease, some hemoglobinopathies (like thalassemia or Hb C disease), and after asplenia or splenectomy. On the slide, the bullseye pattern is the giveaway that identifies a target cell. Other RBC shapes reflect different processes: a sickle form indicates polymerization of abnormal hemoglobin (sickle cell disease), fragmented cells point to mechanical destruction (schistocytes in microangiopathic hemolysis), and an elongated, oval form is characteristic of elliptocytes (seen in hereditary elliptocytosis or iron deficiency in some contexts). The target cell’s bullseye pattern is the hallmark that sets it apart.

Codocytes, also called target cells, have a distinctive bullseye appearance on the smear: a central concentration of hemoglobin, a surrounding pale zone, and a peripheral ring of hemoglobin. This shape results from an increased membrane-to-volume ratio, so the cell has more membrane relative to its cytoplasm.

You’ll see this morphology in conditions that alter membrane content or cell volume, such as liver disease, some hemoglobinopathies (like thalassemia or Hb C disease), and after asplenia or splenectomy. On the slide, the bullseye pattern is the giveaway that identifies a target cell.

Other RBC shapes reflect different processes: a sickle form indicates polymerization of abnormal hemoglobin (sickle cell disease), fragmented cells point to mechanical destruction (schistocytes in microangiopathic hemolysis), and an elongated, oval form is characteristic of elliptocytes (seen in hereditary elliptocytosis or iron deficiency in some contexts). The target cell’s bullseye pattern is the hallmark that sets it apart.

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