HAEM5:Acute promyelocytic leukaemia with PML::RARA fusion: Difference between revisions

[[HAEM5:Table_of_Contents|Haematolymphoid Tumours (5th ed.)]]

<blockquote class='blockedit'>{{Box-round|title=HAEM5 Conversion Notes|This page was converted to the new template on 2023-12-07. The original page can be found at [[HAEM4:Acute Promyelocytic Leukemia (APL) with PML-RARA]].

 

==Cancer Category / Type==

 

 

==Cancer Sub-Classification / Subtype==

 

Acute Promyelocytic Leukemia (APL) with PML-RARA

 

 

This is a distinct entity in the World Health Organization (WHO) classification system, and associated French-American-British (FAB) classification is acute promyelocytic leukemia (APL, M3)<ref name=":0">Arber DA, et al., (2017). Acute myeloid leukaemia with recurrent genetic abnormalities, in World Health Organization 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, Arber DA, Hasserjian RP, Le Beau MM, Orazi A, and Siebert R, Editors. Revised 4th Edition. IARC Press: Lyon, France, p134-136.</ref>.

 

 

|'''Signs and Symptoms'''

|EXAMPLE Asymptomatic (incidental finding on complete blood counts)

 

EXAMPLE B-symptoms (weight loss, fever, night sweats)

 

 

EXAMPLE Lymphadenopathy (uncommon)

|'''Laboratory Findings'''

|EXAMPLE Cytopenias

 

!Finding!!Marker

|Positive (universal)||CD13, CD33, CD117, myeloperoxidase (MPO)

|Positive (subset)||CD2 (microgranular APL), CD34 (microgranular APL), CD56 (20% of APL, associated with a worse outcome)

|Negative (universal)||HLA-DR, CD15, CD11a, CD11b, CD11c, CD18

|-

Put your text here and fill in the table

!Chromosomal Rearrangement!!Genes in Fusion (5’ or 3’ Segments)!!Pathogenic Derivative!!Prevalence

!Diagnostic Significance (Yes, No or Unknown)

!Prognostic Significance (Yes, No or Unknown)

|EXAMPLE t(9;22)(q34;q11.2)||EXAMPLE 3'ABL1 / 5'BCR||EXAMPLE der(22)||EXAMPLE 20% (COSMIC)

|Yes

|No

|Yes

|EXAMPLE

 

<blockquote class='blockedit'>{{Box-round|title=v4:Chromosomal Rearrangements (Gene Fusions)|The content below was from the old template. Please incorporate above.}}

This AML subtype is classified based on the presence of a PML-RARA fusion, which results from fusion of the 5’ portion of PML at 15q24.1 and the 3’ portion of RARA at 17q21.1<ref>{{Cite journal|last=de Thé|first=H.|last2=Chomienne|first2=C.|last3=Lanotte|first3=M.|last4=Degos|first4=L.|last5=Dejean|first5=A.|date=1990|title=The t(15;17) translocation of acute promyelocytic leukaemia fuses the retinoic acid receptor alpha gene to a novel transcribed locus|url=https://www.ncbi.nlm.nih.gov/pubmed/2170850|journal=Nature|volume=347|issue=6293|pages=558–561|doi=10.1038/347558a0|issn=0028-0836|pmid=2170850}}</ref>. 5'PML-3'RARA transcript is expressed in all cases, and 5'RARA-3'PML transcript is found in 2/3 of cases<ref>{{Cite journal|last=Warrell|first=R. P.|last2=de Thé|first2=H.|last3=Wang|first3=Z. Y.|last4=Degos|first4=L.|date=1993|title=Acute promyelocytic leukemia|url=https://www.ncbi.nlm.nih.gov/pubmed/8515790|journal=The New England Journal of Medicine|volume=329|issue=3|pages=177–189|doi=10.1056/NEJM199307153290307|issn=0028-4793|pmid=8515790}}</ref>. Rare cases of APL have cryptic t(15;17)(q24.1;q21.1) such as submicroscopic insertion of RARA into PML leading to the expression of the PML-RARA transcript or three way translocations involving chromosomes 15 and 17 with an additional chromosome<ref name=":1">{{Cite journal|last=Grimwade|first=D.|last2=Gorman|first2=P.|last3=Duprez|first3=E.|last4=Howe|first4=K.|last5=Langabeer|first5=S.|last6=Oliver|first6=F.|last7=Walker|first7=H.|last8=Culligan|first8=D.|last9=Waters|first9=J.|date=1997|title=Characterization of cryptic rearrangements and variant translocations in acute promyelocytic leukemia|url=https://www.ncbi.nlm.nih.gov/pubmed/9389704|journal=Blood|volume=90|issue=12|pages=4876–4885|issn=0006-4971|pmid=9389704}}</ref>.  Several variant translocations involving RARA have also been identified, including t(11;17) and t(5;17)<ref name=":1" />. The 4th edition revision to the World Health Organization renamed APL with t(15;17)(q24.1;q21.1) as APL with PML-RARA<ref name=":0" /><ref>{{Cite journal|last=Arber|first=Daniel A.|last2=Orazi|first2=Attilio|last3=Hasserjian|first3=Robert|last4=Thiele|first4=Jürgen|last5=Borowitz|first5=Michael J.|last6=Le Beau|first6=Michelle M.|last7=Bloomfield|first7=Clara D.|last8=Cazzola|first8=Mario|last9=Vardiman|first9=James W.|date=2016|title=The 2016 revision to the World Health Organization classification of myeloid neoplasms and acute leukemia|url=https://www.ncbi.nlm.nih.gov/pubmed/27069254|journal=Blood|volume=127|issue=20|pages=2391–2405|doi=10.1182/blood-2016-03-643544|issn=1528-0020|pmid=27069254}}</ref>.  

<blockquote class='blockedit'>{{Box-round|title=v4:Clinical Significance (Diagnosis, Prognosis and Therapeutic Implications).|Please incorporate this section into the relevant tables found in:

* Gene Mutations (SNV/INDEL)}}

==Individual Region Genomic Gain / Loss / LOH==

!Chr #!!Gain / Loss / Amp / LOH!!Minimal Region Genomic Coordinates [Genome Build]!!Minimal Region Cytoband

!Diagnostic Significance (Yes, No or Unknown)

!Prognostic Significance (Yes, No or Unknown)

!Therapeutic Significance (Yes, No or Unknown)

!Notes

|EXAMPLE

 

|EXAMPLE Loss

|EXAMPLE

 

chr7:1- 159,335,973 [hg38]

 

|Yes

|Yes

|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 reference).

|EXAMPLE

 

|EXAMPLE Gain

|EXAMPLE

 

chr8:1-145,138,636 [hg38]

 

|No

|No

|No

|EXAMPLE

 

Common recurrent secondary finding for t(8;21) (add reference).

<blockquote class='blockedit'>{{Box-round|title=v4:Genomic Gain/Loss/LOH|The content below was from the old template. Please incorporate above.}}

==Characteristic Chromosomal Patterns==

!Diagnostic Significance (Yes, No or Unknown)

!Prognostic Significance (Yes, No or Unknown)

!Therapeutic Significance (Yes, No or Unknown)

!Notes

|EXAMPLE

 

|Yes

|EXAMPLE:

 

See chromosomal rearrangements table as this pattern is due to an unbalanced derivative translocation associated with oligodendroglioma (add reference).

<blockquote class='blockedit'>{{Box-round|title=v4:Characteristic Chromosomal Aberrations / Patterns|The content below was from the old template. Please incorporate above.}}

==Gene Mutations (SNV / INDEL)==

!Gene; Genetic Alteration!!'''Presumed Mechanism (Tumor Suppressor Gene [TSG] / Oncogene / Other)'''!!'''Prevalence (COSMIC /  TCGA / Other)'''!!'''Concomitant Mutations'''!!'''Mutually Exclusive Mutations'''

!'''Diagnostic Significance (Yes, No or Unknown)'''

!Prognostic Significance (Yes, No or Unknown)

!Therapeutic Significance (Yes, No or Unknown)

!Notes

|EXAMPLE: TP53; Variable LOF mutations

EXAMPLE:

 

EGFR; Exon 20 mutations

 

EXAMPLE: BRAF; Activating mutations

|EXAMPLE: TSG

|EXAMPLE: 20% (COSMIC)

 

EXAMPLE: 30% (add Reference)

|EXAMPLE: IDH1 R123H

|EXAMPLE: EGFR amplification

|}

Note: A more extensive list of mutations can be found in cBioportal (https://www.cbioportal.org/), COSMIC (https://cancer.sanger.ac.uk/cosmic), ICGC (https://dcc.icgc.org/) and/or other databases. When applicable, gene-specific pages within the CCGA site directly link to pertinent external content.

 

<blockquote class='blockedit'>{{Box-round|title=v4:Gene Mutations (SNV/INDEL)|The content below was from the old template. Please incorporate above.}}

Put your text here and fill in the table <span style="color:#0070C0">(''Instructions: Can include references in the table.'')</span>

|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

<blockquote class='blockedit'>{{Box-round|title=v4:Genes and Main Pathways Involved|The content below was from the old template. Please incorporate above.}}

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[[Category:HAEM5]][[Category:DISEASE]][[Category:Diseases A]]