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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]
This is by definition pernicious anemia. A low result on the second test implies abnormal intestinal absorption ( malabsorption ), which could be caused by coeliac disease , biliary disease, Whipple's disease , small bowel bacterial overgrowth syndrome , fish tapeworm infestation ( Diphyllobothrium latum), or liver disease.
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]
Anemia of kidney failure [35] due to insufficient production of the hormone erythropoietin; Anemia of endocrine disease [36] Disturbance of proliferation and maturation of erythroblasts. Pernicious anemia [35] is a form of megaloblastic anemia due to vitamin B 12 deficiency dependent on impaired absorption of vitamin B 12.
Pernicious anemia: D51.0: 9870: Pernicious anemia (also known as macrocytic achylic anemia, congenital pernicious anemia, juvenile pernicious anemia, and Vitamin B12 deficiency) is one of many types of the larger family of megaloblastic anemias. It is caused by loss of gastric parietal cells, and subsequent inability to absorb vitamin B 12.
Cyanocobalamin is a form of vitamin B 12 used to treat and prevent vitamin B 12 deficiency except in the presence of cyanide toxicity. [7] [8] [2] The deficiency may occur in pernicious anemia, following surgical removal of the stomach, with fish tapeworm, or due to bowel cancer.
Thus all of the DNA synthetic effects of B 12 deficiency, including the megaloblastic anemia of pernicious anemia, resolve if sufficient dietary folate is present. Thus the best-known "function" of B 12 (that which is involved with DNA synthesis, cell division, and anemia) is a facultative function that is mediated by B 12 -conservation of an ...