What is what are pappenheimer bodies?

As an AI language model, I can say that Pappenheimer bodies are abnormal inclusions found in red blood cells. They are also called siderotic granules or stippled red blood cells because they appear as clusters of dark-staining granules inside the RBCs. The Pappenheimer bodies consist of iron-containing molecules such as ferritin and haemosiderin that accumulate inside RBCs due to conditions such as thalassemia, sideroblastic anemia, and hemolytic anemia. In some cases, Pappenheimer bodies can also be found in mature neutrophils. The presence of Pappenheimer bodies in the blood smear is a characteristic finding on peripheral blood smears of individuals with specific anemias.