# What is the main difference between acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL)? Canonical page: https://clinicsjo.com/en/faq/aml-vs-all-differences Language: en Category: oncology Publisher: ClinicsJo Published: 2026-09-11T15:00:42.571Z Content updated: 2026-09-11T15:00:42.571Z Translation (ar): https://clinicsjo.com/ar/faq/aml-vs-all-differences ## The difference in cell lineage Both are forms of acute leukemia, meaning they can progress quickly without treatment, but the fundamental difference is the blood-cell lineage from which the cancer develops. AML involves abnormal cells of the myeloid lineage, particularly immature cells called myeloblasts. ALL develops from immature lymphoid cells, called lymphoblasts. Blood-forming stem cells can develop along either the myeloid or lymphoid pathway, so identifying the lineage is central to classifying the leukemia and selecting appropriate treatment. [\[1\]]() [\[2\]]() In both diseases, abnormal cells can build up in the bone marrow and blood and crowd out healthy blood cells, potentially causing anemia, infections, and easy bleeding. Symptoms such as fatigue, fever, bruising, or bleeding may occur in either disease, so symptoms alone cannot reliably distinguish AML from ALL. [\[1\]]() [\[2\]]() ## How does diagnosis differ? Evaluation of both diseases generally begins with a medical history, physical examination, blood tests such as a complete blood count and blood smear, and examination of the bone marrow. However, determining whether the abnormal cells belong to the myeloid or lymphoid lineage requires characterization of the cells, together with genetic and chromosome testing that can identify the specific subtype and changes that may affect prognosis and treatment choices. [\[1\]]() [\[2\]]() Additional tests may be performed after diagnosis to determine whether leukemia has involved other parts of the body. In ALL, assessment of the central nervous system is particularly important because leukemia cells can spread to the brain or spinal cord; evaluation may include a lumbar puncture and examination of cerebrospinal fluid. Similar assessment can also be used in AML when clinically appropriate. [\[1\]]() [\[2\]]() ## How does treatment differ? Treatment differs because the cancer cells and their biological characteristics are different. AML may be treated with anticancer therapy that can include chemotherapy, other anticancer medicines, and, in selected circumstances, radiation therapy or stem cell transplantation. The choice depends on the AML subtype, disease characteristics, and the person's overall condition. AML treatment commonly includes a phase aimed at achieving remission followed by post-remission treatment intended to reduce the risk of relapse. [\[3\]]() [\[1\]]() ALL is generally treated through several phases and may include chemotherapy, targeted therapy, stem cell transplantation, or radiation therapy in selected situations. Treatment for ALL also usually includes central nervous system prophylaxis to help prevent leukemia cells from reaching the brain and spinal cord. [\[2\]]() ## What does this mean for a patient? The type of leukemia cannot be determined from symptoms or from a high white blood cell count alone. Accurate diagnosis depends on blood and bone marrow testing, characterization of the leukemia cells, and genetic and chromosome studies. Unexplained fever, unusual bleeding or bruising, marked paleness or fatigue, or recurrent infections should prompt timely medical assessment because acute leukemia can progress quickly. [\[1\]]() [\[2\]]() For further reading: [Acute Myeloid Leukemia (AML) article (Arabic article)](). ## Medical references - [Acute Myeloid Leukemia]() - [Acute Myeloid Leukemia Treatment (PDQ®)–Patient Version]() - [Acute Lymphoblastic Leukemia | Acute Lymphocytic Leukemia | MedlinePlus]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/aml-vs-all-differences#answer