Megakaryoblastic acute myeloid leukemia

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Megakaryoblastic acute myeloid leukemia with t(1;22)(p13;q13)

ORPHA:402023Disease

Also called Megakaryoblastic AML with t(1;22)(p13;q13)

What it is

Megakaryoblastic acute myeloid leukemia with t(1;22)(p13;q13) is a rare subtype of acute myeloid leukemia with recurrent cytogenetic abnormalities characterized by clonal proliferation of myeloid blasts with predominantly megakaryoblastic differentiation in the bone marrow and blood, often with extensive infiltration of the abdominal organs. It occurs typically in infants and usually presents with hepatosplenomegaly, anemia, thrombocytopenia and nonspecific symptoms related to ineffective hematopoiesis (fatigue, bleeding and bruising, recurrent infections). Myelofibrosis and fibrosis of other infiltrated organs is also characteristic of this disease.

Key facts

Inheritance
Not applicable
Classified as
Disease

Recorded for the broader condition

Prevalence
1-9 / 1 000 000 (annual incidence, Europe)Acute myeloid leukemia with recurrent genetic anomaly

Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.

Genes

MRTFAPart of a fusion gene
RBM15Part of a fusion gene

ICD-10 codes

C94.2filed under a broader ICD-10 category — shared with 3 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MONDO 0018436UMLS C4706584

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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