Define Pernicious Anemia Question & Answer Guide (With Explanation)

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Original Question

Define pernicious anemia. How is this similar to or distinct from megloblastic anemia or cobalamine deficiency? What are the causes of pernicious anemia? What is the significance of an elevated MCV and decreased vitamin B12 levels? What is vitamin B12 normally used for in the cell? How does this related to the macrocytic anemia? Explain how decreased vitamin B12 levels are related to the laboratory finding of increased MCV? What is the significance of the normal RBC folate levels and positive anti-intrinsic antibody test? Besides anemia, what are other signs and symptoms that someone with cobalamine deficiency may present with? In which population is this most problematic (since it can be misdiagnosed)? How would pernicious anemia be treated? What is the prognosis? What other considerations would you have for a patient? compare and contrast with reference to this case scenario belowA 40-year-old man, is newly diagnosed with pernicious anemia. His lab results are as follows He was diagnosed with macrocytic anemia, with an increased mean corpuscular volume (MCV, 112) marginal WBC and platelet counts, reticulocytopenia, elevated LDH and indirect bilirubin. Further studies revealed a decreased vitamin B12 level (62 pg/ml), but normal RBC folate levels (700). An anti-intrinsic antibody test was positive. provide in text citation and 2022-2025 references

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