Auer rods on peripheral smear are most diagnostic of:

Auer rods on peripheral smear are most diagnostic of:

• A. Acute myeloid leukemia
• B. Chronic myeloid leukemia
• C. Acute lymphoblastic leukemia
• D. Chronic lymphocytic leukemia

Answer: (A)

Auer rods are rod-like, azurophilic inclusions found in the cytoplasm of myeloid precursor cells and are positive for myeloperoxidase. Their presence on a smear is highly specific for acute myeloid leukemia, reflecting a malignant proliferation of myeloid blasts. This makes AML the diagnosis most strongly supported by Auer rods, especially in subtypes with promyelocytes where they can be prominent. These inclusions are not typical of lymphoid leukemias, such as acute or chronic lymphoblastic leukemia, nor of chronic myeloid leukemia, which usually shows a spectrum of mature and maturing granulocytes without the defining Auer rods. In summary, Auer rods point to AML.

Auer rods are rod-like, azurophilic inclusions found in the cytoplasm of myeloid precursor cells and are positive for myeloperoxidase. Their presence on a smear is highly specific for acute myeloid leukemia, reflecting a malignant proliferation of myeloid blasts. This makes AML the diagnosis most strongly supported by Auer rods, especially in subtypes with promyelocytes where they can be prominent.

These inclusions are not typical of lymphoid leukemias, such as acute or chronic lymphoblastic leukemia, nor of chronic myeloid leukemia, which usually shows a spectrum of mature and maturing granulocytes without the defining Auer rods. In summary, Auer rods point to AML.