True regarding anemia of chronic ds. are – A/E :
**Core Concept**
Anemia of chronic disease (ACD) is a type of anemia characterized by a decrease in iron availability due to inflammation, leading to impaired erythropoiesis. This condition is often seen in patients with chronic infections, autoimmune disorders, or malignancies.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of ACD, where the body's response to chronic inflammation leads to the production of hepcidin, a hormone that regulates iron metabolism. Hepcidin binds to ferroportin, the only known iron exporter, leading to its internalization and degradation. This results in decreased iron absorption from the gut and increased iron sequestration in macrophages, making it unavailable for erythropoiesis. The key enzyme involved in this process is ferroportin, which is downregulated in ACD.
**Why Each Wrong Option is Incorrect**
**Option A:** This option might be incorrect because it does not directly relate to the pathophysiology of ACD. However, without the actual text, it's difficult to assess its accuracy.
**Option B:** This option might be incorrect because it could be a characteristic of iron-deficiency anemia, not ACD. Iron deficiency anemia is caused by a lack of dietary iron, whereas ACD is caused by inflammation.
**Option C:** This option might be incorrect because it could be a characteristic of anemia of chronic kidney disease, not ACD. Anemia of chronic kidney disease is caused by a decrease in erythropoietin production.
**Option D:** This option might be incorrect because it does not directly relate to the pathophysiology of ACD. However, without the actual text, it's difficult to assess its accuracy.
**Clinical Pearl / High-Yield Fact**
A key feature of ACD is the presence of high serum ferritin levels, which can be misleading as it suggests iron overload. However, the ferritin is actually bound to the iron, making it unavailable for erythropoiesis.
**Correct Answer:** Unfortunately, the actual options are missing, please provide the correct options to complete the explanation.