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Disorders of Erythrocytes01:27

Disorders of Erythrocytes

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Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
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Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
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The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
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Bone marrow transplant is a potential cure for several diseases, including cancer and specific genetic disorders. Notably, this procedure is applicable for patients suffering from aplastic anemia, certain types of leukemia, severe combined immunodeficiency disease (SCID), Hodgkin's disease, non-Hodgkin's lymphoma, multiple myeloma, thalassemia, sickle-cell disease, and certain cancers.
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Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
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Polycythemia Vera Masked by Megaloblastic Anemia.

M Loukhnati1, K Khalil1, F E Lahlimi1

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Polycythemia vera (PV) can present with megaloblastic anemia due to Vitamin B12 deficiency. This case report details an atypical PV presentation, highlighting diagnostic complexities.

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Area of Science:

  • Hematology
  • Internal Medicine

Background:

  • Polycythemia vera (PV) is a myeloproliferative disorder causing excess red blood cell production.
  • Megaloblastic anemia results from cobalamin (vitamin B12) and/or folate (vitamin B9) deficiency.

Observation:

  • A case of an 85-year-old North African woman with PV and concurrent Vitamin B12 deficiency megaloblastic anemia is presented.
  • This presentation is atypical and not fully understood in its physiopathology.

Findings:

  • The co-occurrence of megaloblastic anemia and PV in this patient underscores a complex clinical scenario.
  • Diagnostic delays and treatment complexities arise from this unusual association.

Implications:

  • This case highlights the importance of considering Vitamin B12 deficiency in patients with Polycythemia vera.
  • Further research into the physiopathology of this association may improve diagnostic and therapeutic strategies for PV patients.