Acute myeloid leukaemia with minimal differentiation
Haematolymphoid Tumours (WHO Classification, 5th ed.)
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editContent Update To WHO 5th Edition Classification Is In Process; Content Below is Based on WHO 4th Edition ClassificationThis page was converted to the new template on 2023-12-07. The original page can be found at HAEM4:Acute Myeloid Leukemia (AML) with Minimal Differentiation.
(General Instructions – The focus of these pages is the clinically significant genetic alterations in each disease type. This is based on up-to-date knowledge from multiple resources such as PubMed and the WHO classification books. The CCGA is meant to be a supplemental resource to the WHO classification books; the CCGA captures in a continually updated wiki-stye manner the current genetics/genomics knowledge of each disease, which evolves more rapidly than books can be revised and published. If the same disease is described in multiple WHO classification books, the genetics-related information for that disease will be consolidated into a single main page that has this template (other pages would only contain a link to this main page). Use HUGO-approved gene names and symbols (italicized when appropriate), HGVS-based nomenclature for variants, as well as generic names of drugs and testing platforms or assays if applicable. Please complete tables whenever possible and do not delete them (add N/A if not applicable in the table and delete the examples); to add (or move) a row or column in a table, click nearby within the table and select the > symbol that appears. Please do not delete or alter the section headings. The use of bullet points alongside short blocks of text rather than only large paragraphs is encouraged. Additional instructions below in italicized blue text should not be included in the final page content. Please also see Author_Instructions and FAQs as well as contact your Associate Editor or Technical Support.)
Primary Author(s)*
Celeste Eno, PhD, Cedars Sinai Medical Center, Los Angeles, Fabiola Quintero-Rivera, MD, FACMG, University of California Irvine
WHO Classification of Disease
| Structure | Disease |
|---|---|
| Book | Haematolymphoid Tumours (5th ed.) |
| Category | Myeloid proliferations and neoplasms |
| Family | Acute myeloid leukaemia |
| Type | Acute myeloid leukaemia, defined by differentiation |
| Subtype(s) | Acute myeloid leukaemia with minimal differentiation |
WHO Essential and Desirable Genetic Diagnostic Criteria
(Instructions: The table will have the diagnostic criteria from the WHO book autocompleted; remove any non-genetics related criteria. If applicable, add text about other classification systems that define this entity and specify how the genetics-related criteria differ.)
| WHO Essential Criteria (Genetics)* | |
| WHO Desirable Criteria (Genetics)* | |
| Other Classification |
*Note: These are only the genetic/genomic criteria. Additional diagnostic criteria can be found in the WHO Classification of Tumours.
Related Terminology
(Instructions: The table will have the related terminology from the WHO autocompleted.)
| Acceptable | |
| Not Recommended |
Gene Rearrangements
Put your text here and fill in the table (Instructions: Details on clinical significance such as prognosis and other important information can be provided in the notes section. Please include references throughout the table. Do not delete the table.)
| Driver Gene | Fusion(s) and Common Partner Genes | Molecular Pathogenesis | Typical Chromosomal Alteration(s) | Prevalence -Common >20%, Recurrent 5-20% or Rare <5% (Disease) | Diagnostic, Prognostic, and Therapeutic Significance - D, P, T | Established Clinical Significance Per Guidelines - Yes or No (Source) | Clinical Relevance Details/Other Notes |
|---|---|---|---|---|---|---|---|
| EXAMPLE: ABL1 | EXAMPLE: BCR::ABL1 | EXAMPLE: The pathogenic derivative is the der(22) resulting in fusion of 5’ BCR and 3’ABL1. | EXAMPLE: t(9;22)(q34;q11.2) | EXAMPLE: Common (CML) | EXAMPLE: D, P, T | EXAMPLE: Yes (WHO, NCCN) | EXAMPLE:
The t(9;22) is diagnostic of CML in the appropriate morphology and clinical context (add reference). This fusion is responsive to targeted therapy such as Imatinib (Gleevec) (add reference). BCR::ABL1 is generally favorable in CML (add reference). |
| EXAMPLE: CIC | EXAMPLE: CIC::DUX4 | EXAMPLE: Typically, the last exon of CIC is fused to DUX4. The fusion breakpoint in CIC is usually intra-exonic and removes an inhibitory sequence, upregulating PEA3 genes downstream of CIC including ETV1, ETV4, and ETV5. | EXAMPLE: t(4;19)(q25;q13) | EXAMPLE: Common (CIC-rearranged sarcoma) | EXAMPLE: D | EXAMPLE:
DUX4 has many homologous genes; an alternate translocation in a minority of cases is t(10;19), but this is usually indistinguishable from t(4;19) by short-read sequencing (add references). | |
| EXAMPLE: ALK | EXAMPLE: ELM4::ALK
|
EXAMPLE: Fusions result in constitutive activation of the ALK tyrosine kinase. The most common ALK fusion is EML4::ALK, with breakpoints in intron 19 of ALK. At the transcript level, a variable (5’) partner gene is fused to 3’ ALK at exon 20. Rarely, ALK fusions contain exon 19 due to breakpoints in intron 18. | EXAMPLE: N/A | EXAMPLE: Rare (Lung adenocarcinoma) | EXAMPLE: T | EXAMPLE:
Both balanced and unbalanced forms are observed by FISH (add references). | |
| EXAMPLE: ABL1 | EXAMPLE: N/A | EXAMPLE: Intragenic deletion of exons 2–7 in EGFR removes the ligand-binding domain, resulting in a constitutively active tyrosine kinase with downstream activation of multiple oncogenic pathways. | EXAMPLE: N/A | EXAMPLE: Recurrent (IDH-wildtype Glioblastoma) | EXAMPLE: D, P, T | ||
editv4:Chromosomal Rearrangements (Gene Fusions)The content below was from the old template. Please incorporate above.
There is no recurrent rearrangements in this entity.
• t(7;12)(q36;p13), cytogenetically cryptic, leads to MNX1 deregulation and a poor prognosis.
- The morphology of cases is variable, but a significant portion is AML with minimal differentiation or without maturation most common in children[1][2].
- This translocation has also been reported in ALL
• t(10;11)(p12;q14) has an intermediate to poor prognosis[3] .
- Most cases show immature morphology.
- This translocation has also been reported in many other hematological malignancies[4].
| Chromosomal Rearrangement | Genes in Fusion (5’ or 3’ Segments) | Pathogenic Derivative | Prevalence |
|---|---|---|---|
| t(7;12)(q36;p13) | 5’ HLXB9 – 3’ ETV6 | der(12) | Rare |
| t(10;11)(p12;q14) | 5’ CALM – 3’ AF10 | Rare |
End of V4 Section
editv4:Clinical Significance (Diagnosis, Prognosis and Therapeutic Implications).Please incorporate this section into the relevant tables found in:
- Chromosomal Rearrangements (Gene Fusions)
- Individual Region Genomic Gain/Loss/LOH
- Characteristic Chromosomal Patterns
- Gene Mutations (SNV/INDEL)
• Adverse outcome in children. May relate to a lack of more favorable AML cytogenetic abnormalities, such as t(8;21) and inv 16 and presence of high-risk abnormalities (i.e. chromosome 5)[5].
• Patients treated with only chemotherapy in conventional doses.
• Stem cell transplantation may contribute to a longer remission and prolongation of the survival[6].
• MDR1/p-170 protein is positive in blasts and mediates multidrug resistance in adults. This protein functions as a barrier, reducing intracellular concentrations of chemotherapeutics[7][8].
End of V4 Section
Individual Region Genomic Gain/Loss/LOH
Put your text here and fill in the table (Instructions: Includes aberrations not involving gene rearrangements. Details on clinical significance such as prognosis and other important information can be provided in the notes section. Can refer to CGC workgroup tables as linked on the homepage if applicable. Please include references throughout the table. Do not delete the table.)
| Chr # | Gain, Loss, Amp, LOH | Minimal Region Cytoband and/or Genomic Coordinates [Genome Build; Size] | Relevant Gene(s) | Diagnostic, Prognostic, and Therapeutic Significance - D, P, T | Established Clinical Significance Per Guidelines - Yes or No (Source) | Clinical Relevance Details/Other Notes |
|---|---|---|---|---|---|---|
| EXAMPLE:
7 |
EXAMPLE: Loss | EXAMPLE:
chr7 |
EXAMPLE:
Unknown |
EXAMPLE: D, P | EXAMPLE: No | EXAMPLE:
Presence of monosomy 7 (or 7q deletion) is sufficient for a diagnosis of AML with MDS-related changes when there is ≥20% blasts and no prior therapy (add reference). Monosomy 7/7q deletion is associated with a poor prognosis in AML (add references). |
| EXAMPLE:
8 |
EXAMPLE: Gain | EXAMPLE:
chr8 |
EXAMPLE:
Unknown |
EXAMPLE: D, P | EXAMPLE:
Common recurrent secondary finding for t(8;21) (add references). | |
| EXAMPLE:
17 |
EXAMPLE: Amp | EXAMPLE:
17q12; chr17:39,700,064-39,728,658 [hg38; 28.6 kb] |
EXAMPLE:
ERBB2 |
EXAMPLE: D, P, T | EXAMPLE:
Amplification of ERBB2 is associated with HER2 overexpression in HER2 positive breast cancer (add references). Add criteria for how amplification is defined. | |
editv4:Genomic Gain/Loss/LOHThe content below was from the old template. Please incorporate above.
• +4 sole; intermediate/poor prognosis
• +8[9]
• +10 sole; intermediate/poor prognosis[10]
• 11q gain MLL amplification; poor prognosis[9]
• +13 sole; poor prognosis[9][11][12] and associated with TdT expression[13]
• +14[9]
• del(11q)
• Loss and haploinsufficiency of ETV6 through deletion may be a leukemogenic step in AML-M0[2]
End of V4 Section
Characteristic Chromosomal or Other Global Mutational Patterns
Put your text here and fill in the table (Instructions: Included in this category are alterations such as hyperdiploid; gain of odd number chromosomes including typically chromosome 1, 3, 5, 7, 11, and 17; co-deletion of 1p and 19q; complex karyotypes without characteristic genetic findings; chromothripsis; microsatellite instability; homologous recombination deficiency; mutational signature pattern; etc. Details on clinical significance such as prognosis and other important information can be provided in the notes section. Please include references throughout the table. Do not delete the table.)
| Chromosomal Pattern | Molecular Pathogenesis | Prevalence -
Common >20%, Recurrent 5-20% or Rare <5% (Disease) |
Diagnostic, Prognostic, and Therapeutic Significance - D, P, T | Established Clinical Significance Per Guidelines - Yes or No (Source) | Clinical Relevance Details/Other Notes |
|---|---|---|---|---|---|
| EXAMPLE:
Co-deletion of 1p and 18q |
EXAMPLE: See chromosomal rearrangements table as this pattern is due to an unbalanced derivative translocation associated with oligodendroglioma (add reference). | EXAMPLE: Common (Oligodendroglioma) | EXAMPLE: D, P | ||
| EXAMPLE:
Microsatellite instability - hypermutated |
EXAMPLE: Common (Endometrial carcinoma) | EXAMPLE: P, T | |||
editv4:Characteristic Chromosomal Aberrations / PatternsThe content below was from the old template. Please incorporate above.
• No specific chromosomal abnormality is identified
• Complex karyotype[9]
• Unbalanced abnormalities
• Most common: del(5q) or t(5q) and loss of chromosome 7 or del(7q)[9][11] the presence of these abnormalities would place the case in the category of AML with myelodysplasia-related changes per new WHO classification (2017).
• Near tetraploid karyotypes[6]
• Pediatric: Chromosome 5 aberrations, trisomy 21 and hypodiploidy more common in AML M0 than non-M0 counterparts[5]
End of V4 Section
Gene Mutations (SNV/INDEL)
Put your text here and fill in the table (Instructions: This table is not meant to be an exhaustive list; please include only genes/alterations that are recurrent or common as well either disease defining and/or clinically significant. If a gene has multiple mechanisms depending on the type or site of the alteration, add multiple entries in the table. For clinical significance, denote associations with FDA-approved therapy (not an extensive list of applicable drugs) and NCCN or other national guidelines if applicable; Can also refer to CGC workgroup tables as linked on the homepage if applicable as well as any high impact papers or reviews of gene mutations in this entity. Details on clinical significance such as prognosis and other important information such as concomitant and mutually exclusive mutations can be provided in the notes section. Please include references throughout the table. Do not delete the table.)
| Gene | Genetic Alteration | Tumor Suppressor Gene, Oncogene, Other | Prevalence -
Common >20%, Recurrent 5-20% or Rare <5% (Disease) |
Diagnostic, Prognostic, and Therapeutic Significance - D, P, T | Established Clinical Significance Per Guidelines - Yes or No (Source) | Clinical Relevance Details/Other Notes |
|---|---|---|---|---|---|---|
| EXAMPLE:EGFR
|
EXAMPLE: Exon 18-21 activating mutations | EXAMPLE: Oncogene | EXAMPLE: Common (lung cancer) | EXAMPLE: T | EXAMPLE: Yes (NCCN) | EXAMPLE: Exons 18, 19, and 21 mutations are targetable for therapy. Exon 20 T790M variants cause resistance to first generation TKI therapy and are targetable by second and third generation TKIs (add references). |
| EXAMPLE: TP53; Variable LOF mutations
|
EXAMPLE: Variable LOF mutations | EXAMPLE: Tumor Supressor Gene | EXAMPLE: Common (breast cancer) | EXAMPLE: P | EXAMPLE: >90% are somatic; rare germline alterations associated with Li-Fraumeni syndrome (add reference). Denotes a poor prognosis in breast cancer. | |
| EXAMPLE: BRAF; Activating mutations | EXAMPLE: Activating mutations | EXAMPLE: Oncogene | EXAMPLE: Common (melanoma) | EXAMPLE: T | ||
Note: A more extensive list of mutations can be found in cBioportal, COSMIC, and/or other databases. When applicable, gene-specific pages within the CCGA site directly link to pertinent external content.
editv4:Gene Mutations (SNV/INDEL)The content below was from the old template. Please incorporate above.
• Co-existence of gene mutations is common
• FLT3 Mutations: ITD and TKD, 16-22% of cases
• RAS: K-RAS and N-RAS
• IDH1 and IDH2 mutations[14]
• Loss and haploinsufficiency of ETV6 result of heterozygous/homozygous mutations may be a leukemogenic step in AML-M0[2]
• Mutations of RUNX1 occur in ~30% of cases[12], and correlates with the presence of trisomy 13 and increased FLT3 expression. De novo cases with RUNX1 mutations are now classified as the provisional entity of AML with mutated RUNX1 in the 2017 WHO[15].
End of V4 Section
Epigenomic Alterations
• High frequency of gene mutations in epigenetic modifiers implies that epigenetic deregulation and may lead to the pathogenesis of AML-M0[14].
• Histone acetylation and methylation patterns for patients with primary AML (all types) is ongoing[16].
Genes and Main Pathways Involved
Put your text here and fill in the table (Instructions: Please include references throughout the table. Do not delete the table.)
| Gene; Genetic Alteration | Pathway | Pathophysiologic Outcome |
|---|---|---|
| EXAMPLE: BRAF and MAP2K1; Activating mutations | EXAMPLE: MAPK signaling | EXAMPLE: Increased cell growth and proliferation |
| EXAMPLE: CDKN2A; Inactivating mutations | EXAMPLE: Cell cycle regulation | EXAMPLE: Unregulated cell division |
| EXAMPLE: KMT2C and ARID1A; Inactivating mutations | EXAMPLE: Histone modification, chromatin remodeling | EXAMPLE: Abnormal gene expression program |
Genetic Diagnostic Testing Methods
• Bone Marrow and peripheral blood examination for >20% blasts
• Cytochemical analysis, MPO and/or Sudan black B staining (undetectable - 3% positivity) for MPO
• Flow analysis: o Lack of expression of lymphoid-specific antigens cyCD3 for T cells and cyCD79 and cyCD22 for B cells o Positivity for any one of the myelomonocytic lineage antigens known not to be expressed on normal T-lymphoid cells (such as CD13, CD14, CD15, CD33, or CD64)
• Conventional G-banding cytogenetics
• FISH in cases of MLL (KMT2A) amplification and cryptic translocations involving ETV6
Familial Forms
Put your text here (Instructions: Include associated hereditary conditions/syndromes that cause this entity or are caused by this entity.)
Additional Information
Differential Diagnosis: Acute Lymphoblastic Leukemia (more common), mixed phenotype acute leukemia, leukemic phase of large cell lymphoma (less common)
Links
Put your links here
References
(use the "Cite" icon at the top of the page) (Instructions: Add each reference into the text above by clicking where you want to insert the reference, selecting the “Cite” icon at the top of the wiki page, and using the “Automatic” tab option to search by PMID to select the reference to insert. If a PMID is not available, such as for a book, please use the “Cite” icon, select “Manual” and then “Basic Form”, and include the entire reference. To insert the same reference again later in the page, select the “Cite” icon and “Re-use” to find the reference; DO NOT insert the same reference twice using the “Automatic” tab as it will be treated as two separate references. The reference list in this section will be automatically generated and sorted.)
- ↑ Tosi, S.; et al. (2000). "t(7;12)(q36;p13), a new recurrent translocation involving ETV6 in infant leukemia". Genes, Chromosomes & Cancer. 29 (4): 325–332. doi:10.1002/1098-2264(2000)9999:99993.0.co;2-9. ISSN 1045-2257. PMID 11066076.
- ↑ Jump up to: 2.0 2.1 2.2 Silva, F. P. G.; et al. (2008). "ETV6 mutations and loss in AML-M0". Leukemia. 22 (8): 1639–1643. doi:10.1038/leu.2008.34. ISSN 1476-5551. PMID 18305557.
- ↑ Cancer Genome Atlas Research Network; et al. (2013). "Genomic and epigenomic landscapes of adult de novo acute myeloid leukemia". The New England Journal of Medicine. 368 (22): 2059–2074. doi:10.1056/NEJMoa1301689. ISSN 1533-4406. PMC 3767041. PMID 23634996.
- ↑ Caudell, D.; et al. (2008). "The role of CALM-AF10 gene fusion in acute leukemia". Leukemia. 22 (4): 678–685. doi:10.1038/sj.leu.2405074. ISSN 1476-5551. PMC 2366104. PMID 18094714.
- ↑ Jump up to: 5.0 5.1 Barbaric, Draga; et al. (2007). "Minimally differentiated acute myeloid leukemia (FAB AML-M0) is associated with an adverse outcome in children: a report from the Children's Oncology Group, studies CCG-2891 and CCG-2961". Blood. 109 (6): 2314–2321. doi:10.1182/blood-2005-11-025536. ISSN 0006-4971. PMC 1852193. PMID 17158236.
- ↑ Jump up to: 6.0 6.1 Béné, M. C.; et al. (2001). "Acute myeloid leukaemia M0: haematological, immunophenotypic and cytogenetic characteristics and their prognostic significance: an analysis in 241 patients". British Journal of Haematology. 113 (3): 737–745. doi:10.1046/j.1365-2141.2001.02801.x. ISSN 0007-1048. PMID 11380465.
- ↑ Campos, L.; et al. (1992). "Correlation of MDR1/P-170 expression with daunorubicin uptake and sensitivity of leukemic progenitors in acute myeloid leukemia". European Journal of Haematology. 48 (5): 254–258. doi:10.1111/j.1600-0609.1992.tb01803.x. ISSN 0902-4441. PMID 1353726.
- ↑ Wuchter, C.; et al. (1999). "Clinical significance of CD95, Bcl-2 and Bax expression and CD95 function in adult de novo acute myeloid leukemia in context of P-glycoprotein function, maturation stage, and cytogenetics". Leukemia. 13 (12): 1943–1953. doi:10.1038/sj.leu.2401605. ISSN 0887-6924. PMID 10602414.
- ↑ Jump up to: 9.0 9.1 9.2 9.3 9.4 9.5 Klaus, Mirjam; et al. (2004). "Cytogenetic profile in de novo acute myeloid leukemia with FAB subtypes M0, M1, and M2: a study based on 652 cases analyzed with morphology, cytogenetics, and fluorescence in situ hybridization". Cancer Genetics and Cytogenetics. 155 (1): 47–56. doi:10.1016/j.cancergencyto.2004.03.008. ISSN 0165-4608. PMID 15527902.
- ↑ Johansson B and Harrison CJ (2015). Cancer Cytogenetics: Chromosomal and molecular genetic aberrations of tumor cells, 4th edition. Heim S and Mitelman F, Editors, Wiley-Blackwell: p62-84.
- ↑ Jump up to: 11.0 11.1 Cuneo, A.; et al. (1995). "Cytogenetic profile of minimally differentiated (FAB M0) acute myeloid leukemia: correlation with clinicobiologic findings". Blood. 85 (12): 3688–3694. ISSN 0006-4971. PMID 7780152.
- ↑ Jump up to: 12.0 12.1 Silva, Fernando P. G.; et al. (2007). "Trisomy 13 correlates with RUNX1 mutation and increased FLT3 expression in AML-M0 patients". Haematologica. 92 (8): 1123–1126. doi:10.3324/haematol.11296. ISSN 1592-8721. PMID 17650443.
- ↑ Patel, Keyur P.; et al. (2013). "TdT expression in acute myeloid leukemia with minimal differentiation is associated with distinctive clinicopathological features and better overall survival following stem cell transplantation". Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc. 26 (2): 195–203. doi:10.1038/modpathol.2012.142. ISSN 1530-0285. PMC 5485410. PMID 22936064.
- ↑ Jump up to: 14.0 14.1 Kao, Hsiao-Wen; et al. (2014). "Gene mutation patterns in patients with minimally differentiated acute myeloid leukemia". Neoplasia (New York, N.Y.). 16 (6): 481–488. doi:10.1016/j.neo.2014.06.002. ISSN 1476-5586. PMC 4198802. PMID 25022553.
- ↑ Arber DA, et al., (2017). Acute myeloid leukaemia,NOS in WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues, Revised 4th edition. Swerdlow SH, Campo E, Harris NL, Jaffe ES, Pileri SA, Stein H, Thiele J Editors. IARC Press: Lyon, France, p156-158.
- ↑ Hellenbrecht A. ChIP- Chip microarrays to study the epigenome in leukemia. Available at: https://www.leukemia-net.org/content/leukemias/aml/aml_information/chip_microarrays/index_eng.html. Accessed June 20, 2018.
Notes
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*Citation of this Page: “Acute myeloid leukaemia with minimal differentiation”. Compendium of Cancer Genome Aberrations (CCGA), Cancer Genomics Consortium (CGC), updated 02/11/2025, https://ccga.io/index.php/HAEM5:Acute_myeloid_leukaemia_with_minimal_differentiation.