Final answer:
Auer rods are abnormal structures found in the cytoplasm of myeloid cells, typically observed in patients with certain types of leukemia such as acute myeloid leukemia (AML).
Step-by-step explanation:
Auer rods are abnormal structures found in the cytoplasm of myeloid cells, which are a type of white blood cells involved in the immune system. These rods are typically observed under a microscope in patients with certain types of leukemia, such as acute myeloid leukemia (AML). The presence of Auer rods can help in diagnosing and classifying these types of leukemia.