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Pernicious anemia is the most common cause of clinically evident vitamin B 12 deficiency worldwide. [14] Pernicious anemia due to autoimmune problems occurs in about one per 1000 people in the US. Among those over the age of 60, about 2% have the condition. [8] It more commonly affects people of northern European descent. [2]
Higher red blood cell diameter and wider variation in size are often seen in pernicious anaemia. [3] Lower diameter with normal variation in size are often seen after haemorrhage . [ 3 ] A higher variation in size is known as anisocytosis .
Pernicious anemia is the most common cause of vitamin B 12 deficiency anemia in adults, which results from malabsorption of vitamin B 12 due to a lack or loss of intrinsic factor. [2] [8] There are relatively few studies which have assessed the impact of haematological measures in response to B 12 supplementation.
Nutritional anemia can be caused by a lack of iron, protein, vitamin B12, and other vitamins and minerals that are needed for the formation of hemoglobin. However, Iron deficiency anemia is the most common nutritional disorder. [7] Signs of anemia include cyanosis, jaundice, and easy bruising. [7]
A 2013 study of over 400,000 people admitted to US hospitals found that 74% developed anemia at some point during their hospital stay. [5] Iatrogenic anemia is of particular concern in intensive care medicine, [6]: 629 because people who are critically ill require frequent blood tests and have a higher risk of developing anemia due to lower hemoglobin levels and impaired production of red ...
A defect in either of these protein components can cause this syndrome. This is a rare disease, with a prevalence about 1 in 200,000, [1] and is usually seen in patients of European ancestry. Vitamin B 12 is an important vitamin needed for proper functioning of the bone marrow; if deficient, this may lead to decreased marrow output and anemia.
The most common causes of microcytic anemia are iron deficiency (due to inadequate dietary intake, gastrointestinal blood loss, or menstrual blood loss), thalassemia, sideroblastic anemia or chronic disease. In iron deficiency anemia (microcytic anemia), it can be as low as 60 to 70 femtolitres
Chronic fatigue associated with GSE is a systemic disorder, however there are neurological components that are especially manifest in blood deficiencies like avitaminosis, amineralosis and anemia. Reduced iron and the lack of vitamins folate, B 6 , B 12 and malabsorption of essential fatty acids can cause depression and chronic fatigue. [ 91 ]