STBT5:Myxoinflammatory fibroblastic sarcoma: Difference between revisions
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Authorship of MIFS |
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<span style="color:#0070C0">(''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 [https://www.genenames.org/ <u>HUGO-approved gene names and symbols</u>] (italicized when appropriate), [https://varnomen.hgvs.org/ <u>HGVS-based nomenclature for variants</u>], 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'' </span><u>''[[Author_Instructions]]''</u><span style="color:#0070C0"> ''and [[Frequently Asked Questions (FAQs)|<u>FAQs</u>]] as well as contact your [[Leadership|<u>Associate Editor</u>]] or [mailto:CCGA@cancergenomics.org <u>Technical Support</u>].)''</span> | <span style="color:#0070C0">(''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 [https://www.genenames.org/ <u>HUGO-approved gene names and symbols</u>] (italicized when appropriate), [https://varnomen.hgvs.org/ <u>HGVS-based nomenclature for variants</u>], 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'' </span><u>''[[Author_Instructions]]''</u><span style="color:#0070C0"> ''and [[Frequently Asked Questions (FAQs)|<u>FAQs</u>]] as well as contact your [[Leadership|<u>Associate Editor</u>]] or [mailto:CCGA@cancergenomics.org <u>Technical Support</u>].)''</span> | ||
==Primary Author(s)*== | ==Primary Author(s)*== | ||
Mokhtar H. Abdelhammed, MD; Kathleen Schieffer, PhD | |||
==WHO Classification of Disease== | ==WHO Classification of Disease== | ||
| Line 41: | Line 42: | ||
==Gene Rearrangements== | ==Gene Rearrangements== | ||
''BRAF'' gene fusions are identified in approximately 33% of myxoinflammatory fibroblastic sarcoma (MIFS) cases.<ref name=":0">{{Cite journal|last=Hirose|first=Takeshi|last2=Chang|first2=Hsin‐Yi|last3=Saoud|first3=Carla|last4=Lefkowitz|first4=Robert A.|last5=Athanasian|first5=Edward|last6=Antonescu|first6=Cristina R.|date=2025-01|title=A Clinicopathologic and Molecular Reappraisal of Myxoinflammatory Fibroblastic Sarcoma—A Controversial and Pathologically Challenging Low‐Grade Sarcoma|url=https://onlinelibrary.wiley.com/doi/10.1002/gcc.70018|journal=Genes, Chromosomes and Cancer|language=en|volume=64|issue=1|doi=10.1002/gcc.70018|issn=1045-2257}}</ref><ref name=":1">{{Cite journal|last=Kao|first=Yu-Chien|last2=Ranucci|first2=Valentina|last3=Zhang|first3=Lei|last4=Sung|first4=Yun-Shao|last5=Athanasian|first5=Edward A.|last6=Swanson|first6=David|last7=Dickson|first7=Brendan C.|last8=Antonescu|first8=Cristina R.|date=2017-11|title=Recurrent BRAF Gene Rearrangements in Myxoinflammatory Fibroblastic Sarcomas, but Not Hemosiderotic Fibrolipomatous Tumors|url=https://journals.lww.com/00000478-201711000-00002|journal=American Journal of Surgical Pathology|language=en|volume=41|issue=11|pages=1456–1465|doi=10.1097/PAS.0000000000000899|issn=0147-5185}}</ref><ref name=":2">{{Cite journal|last=Klubíčková|first=Natálie|last2=Agaimy|first2=Abbas|last3=Hájková|first3=Veronika|last4=Ptáková|first4=Nikola|last5=Grossmann|first5=Petr|last6=Šteiner|first6=Petr|last7=Michal|first7=Michal|last8=Michal|first8=Michael|date=2022-10|title=RNA-sequencing of myxoinflammatory fibroblastic sarcomas reveals a novel SND1::BRAF fusion and 3 different molecular aberrations with the potential to upregulate the TEAD1 gene including SEC23IP::VGLL3 and TEAD1::MRTFB gene fusions|url=https://link.springer.com/10.1007/s00428-022-03368-7|journal=Virchows Archiv|language=en|volume=481|issue=4|pages=613–620|doi=10.1007/s00428-022-03368-7|issn=0945-6317}}</ref><ref name=":3">{{Cite journal|last=Suster|first=David|last2=Michal|first2=Michael|last3=Huang|first3=Huiya|last4=Ronen|first4=Shira|last5=Springborn|first5=Stephanie|last6=Debiec-Rychter|first6=Maria|last7=Billings|first7=Steven D.|last8=Goldblum|first8=John R.|last9=Rubin|first9=Brian P.|date=2020-12|title=Myxoinflammatory fibroblastic sarcoma: an immunohistochemical and molecular genetic study of 73 cases|url=https://linkinghub.elsevier.com/retrieve/pii/S0893395222004227|journal=Modern Pathology|language=en|volume=33|issue=12|pages=2520–2533|doi=10.1038/s41379-020-0580-6}}</ref><ref name=":4">{{Cite journal|last=Harnisch|first=Kim|last2=Bode|first2=Beata|last3=Chijioke|first3=Obinna|last4=Hench|first4=Ivana Bratic|last5=Kazakov|first5=Dmitry V.|date=2025-12|title=Myxoinflammatory Fibroblastic Sarcoma, Nodular-Necrotizing Variant With Two YAP1::MAML2 Fusions and TRIM24::BRAF Fusion|url=https://journals.lww.com/10.1097/DAD.0000000000003107|journal=The American Journal of Dermatopathology|language=en|volume=47|issue=12|pages=976–978|doi=10.1097/DAD.0000000000003107|issn=0193-1091}}</ref><ref name=":5">{{Cite journal|last=Arbajian|first=Elsa|last2=Hofvander|first2=Jakob|last3=Magnusson|first3=Linda|last4=Mertens|first4=Fredrik|date=2020-05|title=Deep sequencing of myxoinflammatory fibroblastic sarcoma|url=https://onlinelibrary.wiley.com/doi/10.1002/gcc.22832|journal=Genes, Chromosomes and Cancer|language=en|volume=59|issue=5|pages=309–317|doi=10.1002/gcc.22832|issn=1045-2257}}</ref> Multiple fusion partners have been described, including ''TOM1L2, SND1, ZNF335, TRIM24'', and ''ROBO1''. In addition, ''TGFBR3-OGA (MGEA5)'' rearrangements, resulting from the t(1;10)(p22;q24) translocation, are detected in approximately 32% of cases.<ref name=":0" /><ref name=":5" /><ref name=":6">{{Cite journal|last=Lambert|first=Isabelle|last2=Debiec-Rychter|first2=Maria|last3=Guelinckx|first3=Paul|last4=Hagemeijer|first4=Anne|last5=Sciot|first5=Raf|date=2001-05|title=Acral myxoinflammatory fibroblastic sarcoma with unique clonal chromosomal changes|url=http://link.springer.com/10.1007/s004280000376|journal=Virchows Archiv|language=en|volume=438|issue=5|pages=509–512|doi=10.1007/s004280000376|issn=0945-6317}}</ref><ref name=":7">{{Cite journal|last=Hallor|first=Karolin H|last2=Sciot|first2=Raf|last3=Staaf|first3=Johan|last4=Heidenblad|first4=Markus|last5=Rydholm|first5=Anders|last6=Bauer|first6=Henrik CF|last7=Åström|first7=Kristina|last8=Domanski|first8=Henryk A|last9=Meis|first9=Jeanne M|date=2009-04|title=Two genetic pathways, t(1;10) and amplification of 3p11–12, in myxoinflammatory fibroblastic sarcoma, haemosiderotic fibrolipomatous tumour, and morphologically similar lesions|url=https://pathsocjournals.onlinelibrary.wiley.com/doi/10.1002/path.2513|journal=The Journal of Pathology|language=en|volume=217|issue=5|pages=716–727|doi=10.1002/path.2513|issn=0022-3417}}</ref><ref name=":8">{{Cite journal|last=Liu|first=Huifei|last2=Sukov|first2=William R.|last3=Ro|first3=Jae Y.|date=2019-02-01|title=The t(1;10)(p22;q24) TGFBR3/MGEA5 Translocation in Pleomorphic Hyalinizing Angiectatic Tumor, Myxoinflammatory Fibroblastic Sarcoma, and Hemosiderotic Fibrolipomatous Tumor|url=https://aplm.kglmeridian.com/view/journals/arpa/143/2/article-p212.xml|journal=Archives of Pathology & Laboratory Medicine|language=en|volume=143|issue=2|pages=212–221|doi=10.5858/arpa.2017-0412-RA|issn=0003-9985}}</ref><ref name=":9">{{Cite journal|last=Antonescu|first=Cristina R.|last2=Zhang|first2=Lei|last3=Nielsen|first3=G.Petur|last4=Rosenberg|first4=Andrew E.|last5=Cin|first5=Paola Dal|last6=Fletcher|first6=Christopher D. M.|date=2011-10|title=Consistent t(1;10) with rearrangements of TGFBR3 and MGEA5 in both myxoinflammatory fibroblastic sarcoma and hemosiderotic fibrolipomatous tumor|url=https://onlinelibrary.wiley.com/doi/10.1002/gcc.20897|journal=Genes, Chromosomes and Cancer|language=en|volume=50|issue=10|pages=757–764|doi=10.1002/gcc.20897|issn=1045-2257}}</ref><ref name=":10">{{Cite journal|last=Boland|first=Jennifer M.|last2=Folpe|first2=Andrew L.|date=2017-09|title=Hemosiderotic Fibrolipomatous Tumor, Pleomorphic Hyalinizing Angiectatic Tumor, and Myxoinflammatory Fibroblastic Sarcoma: Related or Not?|url=https://journals.lww.com/00125480-201709000-00004|journal=Advances in Anatomic Pathology|language=en|volume=24|issue=5|pages=268–277|doi=10.1097/PAP.0000000000000151|issn=1072-4109}}</ref><ref name=":11">{{Cite journal|last=Elco|first=Christopher P.|last2=Mariño-Enríquez|first2=Adrián|last3=Abraham|first3=John A.|last4=Cin|first4=Paola Dal|last5=Hornick|first5=Jason L.|date=2010-11|title=Hybrid Myxoinflammatory Fibroblastic Sarcoma/Hemosiderotic Fibrolipomatous Tumor: Report of a Case Providing Further Evidence for a Pathogenetic Link|url=https://journals.lww.com/00000478-201011000-00021|journal=American Journal of Surgical Pathology|language=en|volume=34|issue=11|pages=1723–1727|doi=10.1097/PAS.0b013e3181f17d51|issn=0147-5185}}</ref><ref name=":12">{{Cite journal|last=Zreik|first=Riyam T.|last2=Carter|first2=Jodi M.|last3=Sukov|first3=William R.|last4=Ahrens|first4=William A.|last5=Fritchie|first5=Karen J.|last6=Montgomery|first6=Elizabeth A.|last7=Weiss|first7=Sharon W.|last8=Folpe|first8=Andrew L.|date=2016-07|title=TGFBR3 and MGEA5 rearrangements are much more common in “hybrid” hemosiderotic fibrolipomatous tumor-myxoinflammatory fibroblastic sarcomas than in classical myxoinflammatory fibroblastic sarcomas: a morphological and fluorescence in situ hybridization study|url=https://linkinghub.elsevier.com/retrieve/pii/S0046817716000678|journal=Human Pathology|language=en|volume=53|pages=14–24|doi=10.1016/j.humpath.2016.02.005}}</ref><ref name=":13">{{Cite journal|last=Carter|first=Jodi M.|last2=Sukov|first2=William R.|last3=Montgomery|first3=Elizabeth|last4=Goldblum|first4=John R.|last5=Billings|first5=Steven D.|last6=Fritchie|first6=Karen J.|last7=Folpe|first7=Andrew L.|date=2014-09|title=TGFBR3 and MGEA5 Rearrangements in Pleomorphic Hyalinizing Angiectatic Tumors and the Spectrum of Related Neoplasms|url=https://journals.lww.com/00000478-201409000-00003|journal=American Journal of Surgical Pathology|language=en|volume=38|issue=9|pages=1182–1992|doi=10.1097/PAS.0000000000000212|issn=0147-5185}}</ref> ''YAP1::MAML2'' fusions are characteristic of the “nodular necrotizing” variant of MIFS and can co-exist with BRAF fusions.<ref name=":0" /><ref name=":14">{{Cite journal|last=Perret|first=Raul|last2=Tallegas|first2=Matthias|last3=Velasco|first3=Valérie|last4=Soubeyran|first4=Isabelle|last5=Coindre|first5=Jean-Michel|last6=Azmani|first6=Rihab|last7=Baud|first7=Jessica|last8=Bacle|first8=Guillaume|last9=De Pinieux|first9=Gonzague|date=2022-10|title=Recurrent YAP1::MAML2 fusions in “nodular necrotizing” variants of myxoinflammatory fibroblastic sarcoma: a comprehensive study of 7 cases|url=https://linkinghub.elsevier.com/retrieve/pii/S089339522200254X|journal=Modern Pathology|language=en|volume=35|issue=10|pages=1398–1404|doi=10.1038/s41379-022-01096-6}}</ref><ref name=":15">{{Cite journal|last=Harnisch|first=Kim|last2=Bode|first2=Beata|last3=Chijioke|first3=Obinna|last4=Hench|first4=Ivana Bratic|last5=Kazakov|first5=Dmitry V.|date=2025-12|title=Myxoinflammatory Fibroblastic Sarcoma, Nodular-Necrotizing Variant With Two YAP1::MAML2 Fusions and TRIM24::BRAF Fusion|url=https://journals.lww.com/10.1097/DAD.0000000000003107|journal=The American Journal of Dermatopathology|language=en|volume=47|issue=12|pages=976–978|doi=10.1097/DAD.0000000000003107|issn=0193-1091}}</ref> More recently, several novel fusions have been described, including ''RRAGB::CCNB3, FGFR1::ZBTB47, SEC23IP::VGLL3'', and ''TEAD1::MRTFB''.<ref name=":0" /><ref name=":2" /> | |||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
| Line 50: | Line 51: | ||
!Clinical Relevance Details/Other Notes | !Clinical Relevance Details/Other Notes | ||
|- | |- | ||
|< | |''BRAF'' <ref name=":0" /><ref name=":1" /><ref name=":2" /><ref name=":3" /><ref name=":4" /><ref name=":5" /> | ||
|''TOM1L2::BRAF'' <ref name=":1" />; ''SND1::BRAF''<ref name=":2" />; ''ZNF335::BRAF''<ref name=":3" />; ''TRIM24::BRAF''<ref name=":4" />; ''ROBO1::BRAF''<ref name=":5" /> | |||
|Fusion leads to constitutive activation of the MAPK (MEK/ERK) pathway | |||
|Variable; partner dependent | |||
|< | |Recurrent (33%) <ref name=":0" /><ref name=":1" /><ref name=":2" /><ref name=":3" /><ref name=":4" /><ref name=":5" /> | ||
|D, T<ref name=":2" /> | |||
|Yes, (WHO) | |||
|Potential sensitivity to MEK inhibitors<ref name=":2" /> | |||
|- | |- | ||
|< | |''TGFBR3''<ref name=":0" /><ref name=":5" /><ref name=":6" /><ref name=":7" /><ref name=":8" /><ref name=":9" /><ref name=":10" /><ref name=":11" /><ref name=":12" /><ref name=":13" /> | ||
|''TGFBR3-OGA (MGEA5)'' | |||
|Translocation t(1;10) does not result in a fusion transcript [6,8] but results in transcriptional dysregulation related to breakpoint rearrangement; altered TGF-β signaling modulation and transcriptionally activated of nearby genes to ''OGA'' including ''FGF8'', ''NPM3 ''as a consequence of the rearrangement | |||
| | |Balanced or unbalanced t(1;10)(p22;q24); hybrid MIFS/ Haemosiderotic fibrohistiocytic lipomatous lesion (HFLT) with der(10)t(1;10) | ||
|< | |32% of pure MIFS<ref name=":0" /> | ||
|< | |D | ||
|Yes, (WHO) | |||
|Recurrent in HFLT, PHAT, and subsets of MIFS; supports neoplastic nature<ref name=":9" /><ref name=":10" /><ref name=":11" /> Frequently identified in hybrid HFLT/MIFS lesions<ref name=":12" /><ref name=":13" /> | |||
|- | |- | ||
|< | |''YAP1''<ref name=":0" /><ref name=":14" /><ref name=":15" /> | ||
|''YAP1::MAML2'' | |||
|Activates transcriptional programs related to proliferation and survival (Hippo pathway dysregulation) | |||
|Variable | |||
''YAP1'' locus in 11q22.1 and ''MAML2'' in 11q21<ref name=":14" /> | |||
Involving exon 6 of ''YAP1'' and exon 2 of ''MAML2''<ref name=":15" /> | |||
|Recurrent in 7 cases | |||
|D | |||
|No | |||
|Characteristic of nodular necrotizing MIFS<ref name=":15" /> | |||
|- | |- | ||
|< | |''RRAGB''<ref name=":0" /> | ||
| | |''RRAGB::CCNB3'' | ||
| | |Likely dysregulation of cell cycle signaling | ||
| | |Intra-chromosomal X, includes exons 1–6 of ''RRAGB'' and the entire coding sequencing of ''CCNB3'' | ||
|Rare, 1 case | |||
| | |D | ||
| | |No | ||
| | |Newly described | ||
|- | |- | ||
| | |''FGFR1''<ref name=":0" /> | ||
| | |''FGFR1::ZBTB47'' | ||
| | |Possible activation of FGFR signaling | ||
| | |t(3;8)(p22.1; p11.23). The fusion transcript is composed of the ''FGFR1'' exons1–17 and ''ZBTB47'' exons 2–6 | ||
| | |Rare, 1 case | ||
| | |D, T | ||
| | |No | ||
| | |Possible therapeutic relevance | ||
|- | |||
|''VGLL3''<ref name=":2" /> | |||
|''SEC23IP::VGLL3'' | |||
|Upregulation of TEAD-mediated transcription (Hippo pathway) | |||
|Involving exon 2 of the ''SEC23IP'' gene and exon 2 of the ''VGLL3'' gene at chr10:121,658,471, and chr3:87,027,952 | |||
|Rare, 2 cases | |||
|D | |||
|No | |||
|Alternative mechanism of ''VGLL3'' activation | |||
|- | |||
|''TEAD1''<ref name=":2" /> | |||
|''TEAD1::MRTFB'' | |||
|TEAD pathway activation | |||
|Involving exon 9 of the ''TEAD1'' gene and exon 13 of the ''MRTFB'' gene at chr11:12,904,672, and chr16:14,342,783 | |||
|Rare, 1 case | |||
|D | |||
|No | |||
|Supports Hippo pathway involvement | |||
|} | |} | ||
==Individual Region Genomic Gain/Loss/LOH== | ==Individual Region Genomic Gain/Loss/LOH== | ||
Chromosome 3 amplification involving ''VGLL3'' and ''CHMP2B'' genes is the most common genetic alteration in MIFS.<ref name=":0" /><ref name=":1" /><ref name=":5" /><ref name=":7" /><ref name=":9" /> | |||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
| Line 109: | Line 128: | ||
!Clinical Relevance Details/Other Notes | !Clinical Relevance Details/Other Notes | ||
|- | |- | ||
|< | |3<ref name=":0" /><ref name=":1" /><ref name=":5" /><ref name=":7" /><ref name=":9" /> | ||
|Amplification | |||
|3p11–12 | |||
|''VGLL3, CHMP2B'' | |||
|D, P | |||
|Yes, (WHO) | |||
|Present in majority of MIFS; associated with increased recurrence and metastasis risk<ref name=":0" /> | |||
| | |||
| | |||
| | |||
| | |||
|< | |||
|- | |- | ||
|< | |9<ref name=":5" /> | ||
|Homozygous deletion | |||
| | |9p21 | ||
| | |''CDKN2A/B'' | ||
|<nowiki>- </nowiki> | |||
| | |No | ||
'' | |<nowiki>- </nowiki> | ||
|< | |||
| | |||
|< | |||
|- | |- | ||
| | |13<ref name=":5" /> | ||
| | |Loss | ||
| | |13q14 | ||
| | |''RB1'' | ||
| | |<nowiki>- </nowiki> | ||
| | |No | ||
| | |<nowiki>- </nowiki> | ||
|} | |} | ||
==Characteristic Chromosomal or Other Global Mutational Patterns== | ==Characteristic Chromosomal or Other Global Mutational Patterns== | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
| Line 165: | Line 163: | ||
!Clinical Relevance Details/Other Notes | !Clinical Relevance Details/Other Notes | ||
|- | |- | ||
|< | |Complex copy number alterations<ref name=":0" /><ref name=":5" /><ref name=":7" /> | ||
|Multiple amplifications and deletions | |||
|Common | |||
|D | |||
|No | |||
| | |<nowiki>- </nowiki> | ||
| | |||
| | |||
| | |||
|< | |||
|} | |} | ||
==Gene Mutations (SNV/INDEL)== | ==Gene Mutations (SNV/INDEL)== | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
| Line 198: | Line 179: | ||
!Clinical Relevance Details/Other Notes | !Clinical Relevance Details/Other Notes | ||
|- | |- | ||
| | |NA | ||
|NA | |||
|NA | |||
|NA | |||
|NA | |||
|NA | |||
|NA | |||
| | |||
| | |||
| | |||
| | |||
| | |||
| | |||
|}Note: A more extensive list of mutations can be found in [https://www.cbioportal.org/ <u>cBioportal</u>], [https://cancer.sanger.ac.uk/cosmic <u>COSMIC</u>], and/or other databases. When applicable, gene-specific pages within the CCGA site directly link to pertinent external content. | |}Note: A more extensive list of mutations can be found in [https://www.cbioportal.org/ <u>cBioportal</u>], [https://cancer.sanger.ac.uk/cosmic <u>COSMIC</u>], and/or other databases. When applicable, gene-specific pages within the CCGA site directly link to pertinent external content. | ||
==Epigenomic Alterations== | ==Epigenomic Alterations== | ||
No specific recurrent epigenetic modification pattern has been defined in MIFS. | |||
==Genes and Main Pathways Involved== | ==Genes and Main Pathways Involved== | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
!Gene; Genetic Alteration!!Pathway!!Pathophysiologic Outcome | !Gene; Genetic Alteration!!Pathway!!Pathophysiologic Outcome | ||
|- | |- | ||
| | |''VGLL3'' amplification | ||
| | |Hippo–TEAD signaling | ||
| | |TEAD-driven tumor initiation and progression | ||
|- | |- | ||
| | |''BRAF''; fusions | ||
| | |MAPK (MEK/ERK) | ||
| | |Increased proliferation via ERK activation | ||
|- | |- | ||
| | |''TGFBR3::OGA'' (''MGEA5'') with ''FGF8'' upregulation | ||
| | |FGF signaling | ||
| | |Growth factor–mediated proliferation | ||
|- | |- | ||
| | |''YAP1::MAML2'' | ||
| | |Hippo pathway | ||
| | |Enhanced transcription of pro-proliferative genes | ||
|} | |} | ||
==Genetic Diagnostic Testing Methods== | ==Genetic Diagnostic Testing Methods== | ||
* '''Fluorescence In Situ Hybridization (FISH)''' | |||
# TGFBR3 and OGA (MGEA5) rearrangement analysis using FISH using break-apart probes is the primary diagnostic tool for detecting the t(1;10)(p22;q24). | |||
# VGLL3 amplification can also be detected by FISH on chromosome 3p12.1. | |||
* '''Karyotyping''' | |||
** Identify: | |||
** t(1;10)(p22;q24) | |||
** Unbalanced der(10)t(1;10) chromosomes in hybrid MIFS/HFLT | |||
** Chromosome 3 with 3p11–12 amplification | |||
* '''RNA Sequencing''' | |||
** ''BRAF'' gene fusions with associated partners ''TOM1L2, SND1, ZNF335, TRIM24'', and ''ROBO1'' = | |||
** ''YAP1::MAML2'' | |||
** Other rare fusions ''RRAGB::CCNB3, FGFR1::ZBTB47, SEC23IP::VGLL3'', and ''TEAD1::MRTFB'' | |||
** Identify fusion transcripts associated with the t(1;10) rearrangement. However: The t(1;10) translocation may not always generate functional fusion transcripts. | |||
* '''Real-Time Quantitative PCR (RT-qPCR)''' | |||
** Expression of ''VGLL3'' and ''CHMP2B'' associated with 3p amplification | |||
==Familial Forms== | ==Familial Forms== | ||
No hereditary or germline predisposition syndrome has been associated with MIFS. | |||
==Additional Information== | ==Additional Information== | ||
NA | |||
==Links== | ==Links== | ||
NA | |||
==References== | ==References== | ||
<references /> | <references /> | ||