Aplastic anemia is caused by how?

Written by Li Fang Fang

Hematology

Updated on September 05, 2024

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The etiology of aplastic anemia is unclear. A more classical theory is the seed, soil, and bug theory. The seed theory suggests that patients with this condition have reduced hematopoietic stem cells in the bone marrow, leading to bone marrow failure. The soil theory refers to abnormal microenvironments in the bone marrow of patients, which leads to an abnormal growth environment for stem cells and consequently hematopoietic disturbances. The bug theory, which is commonly referred to in clinical settings as immune dysfunction, plays a major role in the etiology of this condition.

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Written by Li Fang Fang

Hematology

48sec

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Can aplastic anemia be cured completely?

Aplastic anemia clinically is categorized into acute aplastic anemia and chronic aplastic anemia. Acute aplastic anemia appears suddenly and is severe, with a short survival period. Chronic aplastic anemia develops slowly, has a longer history, and is relatively milder in condition. Whether it is acute aplastic anemia or chronic aplastic anemia, curative treatment can only be achieved through allogeneic hematopoietic stem cell transplantation. Although allogeneic hematopoietic stem cell transplantation offers a potential cure for aplastic anemia, there is also a certain rate of failure. Additionally, post-transplant, there is a presence of immune rejection.

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Written by Zhang Xiao Le

Hematology

59sec

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The differences between aplastic anemia and megaloblastic anemia.

Aplastic anemia is a type of bone marrow failure syndrome where patients can present with reduced total blood cells in the peripheral blood, without enlargement of the liver, spleen, or lymph nodes, and an increased ratio of peripheral blood lymphocytes. Bone marrow indicates low regeneration, reduced hematopoietic tissue, and increased non-hematopoietic tissue, with the condition arising from changes in the bone marrow microenvironment leading to a reduction in blood cells. Megaloblastic anemia, also known as nutritional anemia, is primarily caused by a lack of folate and vitamin B12, leading to a red blood cell synthesis disorder and resulting in anemia. Severe megaloblastic anemia can also present with reduced total blood cells. However, the red blood cells typically exhibit macrocytic anemia. In contrast, aplastic anemia generally presents with normocytic anemia.

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Written by Li Fang Fang

Hematology

50sec

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Aplastic anemia is classified into several types.

Aplastic anemia is divided into two types: acute aplastic anemia and chronic aplastic anemia. Acute aplastic anemia presents suddenly and is severe. Treatment requires intensified immunotherapy or suppression of hematopoietic stem cell transplantation. Chronic aplastic anemia develops slowly, has a longer history, and is relatively less severe. The treatment for chronic aplastic anemia mainly involves immunotherapy combined with therapy to promote hematopoiesis. In addition, regardless of the type, all cases of aplastic anemia require regular complete blood count checks and, when necessary, supportive treatment with red blood cell and platelet transfusions.

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Written by Zhang Xiao Le

Hematology

1min 13sec

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Are the liver and kidney functions normal in patients with aplastic anemia?

Patients with aplastic anemia generally have normal liver and kidney functions. However, in certain special circumstances, abnormalities in liver and kidney functions may occur, including: Firstly, the routine treatment for aplastic anemia mainly includes the immunosuppressant cyclosporine and the hematopoietic stimulant androgens. The primary side effect of cyclosporine is renal toxicity. Therefore, during the use of cyclosporine, it is necessary to monitor the concentration of cyclosporine; excessive levels can lead to renal dysfunction. Androgens, including stanozolol and danazol, primarily cause hepatic toxicity; hence, it is necessary to monitor liver and kidney functions during treatment of aplastic anemia. The second factor that may cause liver and kidney function abnormalities is severe anemia. Long-term severe anemia can lead to tissue ischemia and hypoxia in the liver or kidneys, and if prolonged, it can cause abnormalities in liver and kidney functions. (Medication use should be carried out under the guidance of a physician.)

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Written by Zhang Xiao Le

Hematology

44sec

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Can patients with aplastic anemia drink corn silk water?

Patients with aplastic anemia can drink corn silk tea, but corn silk tea has no therapeutic effect on aplastic anemia. Aplastic anemia is caused by various causes and mechanisms leading to bone marrow failure, mainly characterized by decreased bone marrow hematopoietic function, decreased total blood cells, and the resulting anemia, bleeding, and infection syndrome. The pathogenesis of aplastic anemia is not clear, mainly due to immune abnormalities. The treatment is mainly the use of immunosuppressants such as cyclosporine and hematopoietic agents, primarily androgens. Corn silk tea does not have a therapeutic effect on the mechanisms of this disease.