BRST5:Secretory carcinoma

Primary Author(s)*

Hui Chen, MD, PhD, The University of Texas MD Anderson Cancer Center, Houston, TX, USA

Katherine Geiersbach, MD, Mayo Clinic - Rochester, MN, USA

WHO Classification of Disease

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Structure	Disease
Book
Category
Family
Type
Subtype(s)

WHO Essential and Desirable Genetic Diagnostic Criteria

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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

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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
NTRK3	ETV6::NTRK3	Fusion results in constitutive activation of NTRK3 tyrosine kinase	t(12;15)(p13;q25)	Common	D, P, T		The ETV6::NTRK3 fusion is diagnostic of secretory carcinoma in the appropriate morphologic and clinical context. This fusion is responsive to TRK inhibitor therapies such as larotrectinib abd entrectinib.

Individual Region Genomic Gain/Loss/LOH

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

Characteristic Chromosomal or Other Global Mutational Patterns

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

Gene Mutations (SNV/INDEL)

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

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.

Genes and Main Pathways Involved

Gene; Genetic Alteration	Pathway	Pathophysiologic Outcome
NTRK3; Activating fusion with 5' partner ETV6	MAPK/PI3K/AKT signaling	Increased cell growth and proliferation

Genetic Diagnostic Testing Methods

FISH, RT-PCR, next generation sequencing

Familial Forms

None

Links

https://www.pathologyoutlines.com/topic/breastmalignantjuvenile.html

Notes

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Prior Author(s):  

References

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