Pernicious anemia can be controlled by injecting the patient with vitamin B12. This type of anemia is caused by poor absorption of vitamin B12, common in patients with gastrointestinal disorders or surgeries. Other anemias involve different causes and treatments.
Among the types of anemia presented in the question, pernicious anemia is the one that can be controlled by injecting the patient with vitamin B12. Pernicious anemia is caused by poor absorption of vitamin B12, and the condition is often seen in patients suffering from disorders like Crohn's disease or undergoing surgical removal of parts of their intestines or stomach. The other types of anemia listed here involve different causes and treatments. For example, iron deficiency anemia is tied to a lack of iron in the body, whereas sickle cell anemia is a genetic disorder that produces improperly shaped red blood cells. Finally, Hodgkin disease, a form of lymphoma, may cause anemia, but it is not directly tied to any vitamin deficiencies.
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