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Data · dataset · 2025

AMI-M1

Listed in Teesside University Research Data Repository

AML-M1 (Acute Myeloid Leukemia, French-American-British Classification M1) Definition: AML-M1 is a subtype of acute myeloid leukemia characterized by a proliferation of myeloblasts (immature white blood cells) with minimal maturation.

Description

It is classified under the FAB (French-American-British) system as M1, which means “without maturation.” Key Features: Bone marrow and blood contain ≥ 20% myeloblasts with minimal differentiation into mature cells.

Myeloblasts typically lack significant granulocytic maturation beyond the blast stage. Common markers: CD13, CD33 are usually positive, HLA-DR often positive. Clinical symptoms: fatigue, anemia, infections, bleeding tendencies due to bone marrow failure.

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Diagnosis: Bone marrow biopsy showing ≥ 20% myeloblasts. Immunophenotyping showing expression of myeloid markers such as CD13, CD33. Cytogenetic and molecular testing to identify mutations (e.g., FLT3, NPM1) that guide prognosis and treatment.

Treatment: Typically involves intensive chemotherapy aimed at inducing remission. May include consolidation chemotherapy and hematopoietic stem cell transplantation in eligible patients. Prognosis: Prognosis depends on various factors including genetic mutations, patient age, and response to treatment.

AML-M1 has a variable prognosis; patients with favorable mutations have better outcomes.

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