Antischkow cells are seen in –
**Core Concept**
Antischkow cells, also known as "football cells" or "golf ball cells," are a type of abnormal red blood cell morphology seen in certain pathological conditions. They are characterized by their irregular, biconcave shape resembling a football or golf ball, with a central pallor and a darker periphery.
**Why the Correct Answer is Right**
Antischkow cells are typically seen in conditions associated with oxidative stress, hemolysis, and membrane damage, such as hereditary spherocytosis, thalassemia, and sideroblastic anemia. The distorted shape of these cells is thought to be due to the loss of membrane surface area and the accumulation of denatured hemoglobin, leading to a loss of cell deformability and increased susceptibility to phagocytosis.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because Antischkow cells are not typically seen in normocytic anemia, which is characterized by a normal mean corpuscular volume (MCV) and is often associated with iron deficiency or chronic disease.
**Option B:** Incorrect because sideroblastic anemia is a type of anemia characterized by the accumulation of iron in mitochondria, but it is not the only condition associated with Antischkow cells.
**Option C:** Incorrect because thalassemia is a genetic disorder affecting hemoglobin synthesis, but it is not the only condition associated with Antischkow cells.
**Clinical Pearl / High-Yield Fact**
Antischkow cells are a key feature of hereditary spherocytosis, a genetic disorder characterized by a deficiency of spectrin or other membrane proteins, leading to a loss of cell shape and increased risk of hemolysis.
**Correct Answer: D. Sideroblastic anemia**