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Pure Red Cell Aplasia (PRCA) is a rare bone marrow disorder characterized by a significant reduction or complete absence of red blood cell production. Unlike other bone marrow failure conditions, PRCA primarily affects red blood cells, while white blood cells and platelets usually remain within normal ranges. The disorder may be congenital, such as Diamond-Blackfan anemia, or acquired due to autoimmune diseases, viral infections, certain medications, thymoma, or other underlying medical conditions.

The most common symptoms result from severe anemia and include persistent fatigue, weakness, dizziness, pale skin, shortness of breath, rapid heartbeat, and reduced exercise tolerance. Because immune function and platelet counts are generally unaffected, frequent infections and abnormal bleeding are uncommon. Diagnosis involves a complete blood count (CBC), reticulocyte count, bone marrow examination, and additional tests to identify potential underlying causes, including viral infections, autoimmune disorders, or tumors.

Treatment depends on the underlying cause and disease severity. Options may include immunosuppressive therapy, corticosteroids, antiviral medications when indicated, treatment of associated conditions, blood transfusions, and supportive care. In cases linked to thymoma, surgical removal of the tumor may improve outcomes. Early diagnosis and appropriate management are essential to relieve symptoms, restore red blood cell production, prevent complications, and improve long-term quality of life for affected individuals.