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HGVS Nomenclature
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Pluto G
2
Sep 18
Clarification on delins vs. individual descriptions for two cis-phased variants separated by 2 unchanged nucleotides (EGFR exon 19)
Dear HGVS Nomenclature Experts, I would like to ask for clarification on the delins recommendations,
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Clarification on delins vs. individual descriptions for two cis-phased variants separated by 2 unchanged nucleotides (EGFR exon 19)
Dear HGVS Nomenclature Experts, I would like to ask for clarification on the delins recommendations,
Sep 18
Heijink, AM (medgen)
,
Johan den Dunnen
2
Sep 16
RNA nomenclature for intron retention with two intronic SNVs
Dear Anne, following HGVS nomenclature recommendations a correct description of the variant is
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RNA nomenclature for intron retention with two intronic SNVs
Dear Anne, following HGVS nomenclature recommendations a correct description of the variant is
Sep 16
Laura Arnaldo
,
Johan den Dunnen
3
Sep 14
Two deletions in cis
Dear Laura, apologies, I made a mistake in the description of the variant. Correct is NC_000019.10:g.
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Two deletions in cis
Dear Laura, apologies, I made a mistake in the description of the variant. Correct is NC_000019.10:g.
Sep 14
Kunc Lorena
,
Johan den Dunnen
2
Sep 10
RNA nomenclature for CTNNA1 intron retention
Dear Lorena, following HGVS nomenclature recommendations I suggest to describe the variant as
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RNA nomenclature for CTNNA1 intron retention
Dear Lorena, following HGVS nomenclature recommendations I suggest to describe the variant as
Sep 10
Grootscholten, PM (medgen)
, …
Genetica UMCG
3
Jul 21
[DICER1 variant van DNA-196229]
Dear Johan, Thank you very much for helping out. I understand your answer. Your recommendations can
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[DICER1 variant van DNA-196229]
Dear Johan, Thank you very much for helping out. I understand your answer. Your recommendations can
Jul 21
Katarzyna Jarząbek
,
Peter Freeman
2
Jul 10
Question Regarding HGVS Nomenclature for Reporting VUS Germline Variants
Hi Katarzyna, All variants in clinical reports should really be described using the HGVS nomenclature
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Question Regarding HGVS Nomenclature for Reporting VUS Germline Variants
Hi Katarzyna, All variants in clinical reports should really be described using the HGVS nomenclature
Jul 10
Anna Matys
, …
Johan den Dunnen
5
Jul 8
Ter: number of amino acids
Dear Ana, sorry, I made a mistake, correct should be "The protein therefor is translated into
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Ter: number of amino acids
Dear Ana, sorry, I made a mistake, correct should be "The protein therefor is translated into
Jul 8
Sock Hoai Chan
,
Johan den Dunnen
4
Jul 8
HGVS protein nomenclature
Dear Sock, please note my previous answer: "Since I assume you want to report the results of the
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HGVS protein nomenclature
Dear Sock, please note my previous answer: "Since I assume you want to report the results of the
Jul 8
Richard White
,
Johan den Dunnen
2
Jun 25
HGVS cdna representation
Dear Richard, please note the description you give (NC_000007.14:g128675621C>CTTC) does not follow
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HGVS cdna representation
Dear Richard, please note the description you give (NC_000007.14:g128675621C>CTTC) does not follow
Jun 25
Teresa Imizcoz
,
Johan den Dunnen
6
Jun 22
Variant nomenclature in clinical reports
Dear Teresa, HGVS nomenclature has been designed to unequivocally describe variants in DNA, RNA and
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Variant nomenclature in clinical reports
Dear Teresa, HGVS nomenclature has been designed to unequivocally describe variants in DNA, RNA and
Jun 22
Obdulia Sánchez Lijarcio
,
Johan den Dunnen
4
Jun 10
HGVS RNA nomenclature for pseudoexon inclusion events
Dear Johan, Thank you very much for taking the time to explain the correct notation and for pointing
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HGVS RNA nomenclature for pseudoexon inclusion events
Dear Johan, Thank you very much for taking the time to explain the correct notation and for pointing
Jun 10
Ketaki Karmalkar
,
Johan den Dunnen
3
Jun 9
Query Regarding HGVS Nomenclature for Copy Number Variants (Amplifications)
Dear Ketaki, sorry to be slow with this reply; an answer is not that simple. 1) you do not give the
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Query Regarding HGVS Nomenclature for Copy Number Variants (Amplifications)
Dear Ketaki, sorry to be slow with this reply; an answer is not that simple. 1) you do not give the
Jun 9
Hannah Masotti
,
Johan den Dunnen
2
Jun 9
Clarification on HGVS RNA Nomenclature for MET Exon 14 Skipping Variant
Dear Hannah, following HGVS nomenclature, the variant should be described as NC_000007.14:g.
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Clarification on HGVS RNA Nomenclature for MET Exon 14 Skipping Variant
Dear Hannah, following HGVS nomenclature, the variant should be described as NC_000007.14:g.
Jun 9
Kerri Smith
,
Johan den Dunnen
2
Jun 9
Nomenclature for Stop-Loss Deletion Variant
Dear Kerri, following HGVS nomenclature the variant should be described as NC_000012.12:g.
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Nomenclature for Stop-Loss Deletion Variant
Dear Kerri, following HGVS nomenclature the variant should be described as NC_000012.12:g.
Jun 9
laura keller
,
Johan T den Dunnen
3
May 19
HGVS nomenclature for cis variants
Dear Johan, Sincere apologies for omitting the NM_. and many many thanks for your help on this case.
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HGVS nomenclature for cis variants
Dear Johan, Sincere apologies for omitting the NM_. and many many thanks for your help on this case.
May 19
Julio Rodríguez
,
Johan den Dunnen
3
May 19
CNV detected by NGS #257
thanks! O martes, 19 de maio de 2026 á/s 09:53:15 UTC+2, Johan den Dunnen escribiu: Dear Julio, yes,
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CNV detected by NGS #257
thanks! O martes, 19 de maio de 2026 á/s 09:53:15 UTC+2, Johan den Dunnen escribiu: Dear Julio, yes,
May 19
Julio Rodríguez
,
Johan den Dunnen
3
May 18
with or without a comma?
Gracias! O xoves, 30 de abril de 2026 á/s 08:45:12 UTC+2, Johan den Dunnen escribiu: Dear julio,
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with or without a comma?
Gracias! O xoves, 30 de abril de 2026 á/s 08:45:12 UTC+2, Johan den Dunnen escribiu: Dear julio,
May 18
Lucy Eng
,
Johan den Dunnen
2
May 8
HGVS of tandem repeats
Dear Lucy, the guidance on the website (https://hgvs-nomenclature.org/stable/recommendations/DNA/
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HGVS of tandem repeats
Dear Lucy, the guidance on the website (https://hgvs-nomenclature.org/stable/recommendations/DNA/
May 8
Maria Kurnikova
,
Johan den Dunnen
4
May 4
het FANCA del ex 15-22
Dear Maria, yes, when the variant was identified in homozygosity, following HGVS nomenclature "
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het FANCA del ex 15-22
Dear Maria, yes, when the variant was identified in homozygosity, following HGVS nomenclature "
May 4
Dmitry Maslennikov
,
Johan den Dunnen
2
Apr 30
HGVS ROH/LOH description
Dear Dmitry, using HGVS nomenclature, LOH with a copy number change is described as a deletion. As
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HGVS ROH/LOH description
Dear Dmitry, using HGVS nomenclature, LOH with a copy number change is described as a deletion. As
Apr 30
Hajer
,
Johan den Dunnen
2
Apr 30
Reportingnew mutation
Dear Hajar, I am not sure what information you need. HGVS nomenclature is a standard to report
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Reportingnew mutation
Dear Hajar, I am not sure what information you need. HGVS nomenclature is a standard to report
Apr 30
Simona Mellone
,
Johan den Dunnen
2
Apr 30
HGVS nomenclature verification – DLL1 variants
Dear Simona, indeed, following HGVS nomenclature the variant should be described as NC_000006.12:g.
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HGVS nomenclature verification – DLL1 variants
Dear Simona, indeed, following HGVS nomenclature the variant should be described as NC_000006.12:g.
Apr 30
Manuel Luypaert
,
Reece Hart
2
Apr 29
Can the 3' rule cause a change in variant reference allele sequence?
Hi Manuel- Yes, a variant that inserts or deletes sequence in the context of a repeated region is
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Can the 3' rule cause a change in variant reference allele sequence?
Hi Manuel- Yes, a variant that inserts or deletes sequence in the context of a repeated region is
Apr 29
David Hernandez
, …
Johan den Dunnen
5
Apr 15
Predefined Protein Descriptions: p.? vs. p.(=) : Clarification request regarding Intronic variants
Dear Fatima, that's up to you, you add the predicted consequences. When you are quite sure the
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Predefined Protein Descriptions: p.? vs. p.(=) : Clarification request regarding Intronic variants
Dear Fatima, that's up to you, you add the predicted consequences. When you are quite sure the
Apr 15
Carolk
, …
Fokkema, Ivo (HG - LUMC)
8
Apr 1
HGVS Nomenclature
Thank you all for your ongoing support. I am exploring ways to incorporate HGVS nomenclature into a
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HGVS Nomenclature
Thank you all for your ongoing support. I am exploring ways to incorporate HGVS nomenclature into a
Apr 1
Deivid Souza
,
Johan den Dunnen
2
Mar 30
Question regarding HGVS classification of a deletion introducing an immediate stop codon
Dear Deivid, HGVS nomenclature is about describing variants. HGVS nomenclature is not about how to
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Question regarding HGVS classification of a deletion introducing an immediate stop codon
Dear Deivid, HGVS nomenclature is about describing variants. HGVS nomenclature is not about how to
Mar 30
Bosscher, L (medgen)
,
Johan den Dunnen
4
Mar 30
Question regarding deletions beyond the transcribed region
Dear Laura, not sure what you mean. Following HGVS nomenclature (see the Uncertain page, hgvs-
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Question regarding deletions beyond the transcribed region
Dear Laura, not sure what you mean. Following HGVS nomenclature (see the Uncertain page, hgvs-
Mar 30
Julio Rodríguez
,
Johan den Dunnen
2
Mar 16
deletion of several genes
Dear Julio, as explained on the HGVS nomenclature "Uncertain" page (https://hgvs-
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deletion of several genes
Dear Julio, as explained on the HGVS nomenclature "Uncertain" page (https://hgvs-
Mar 16
Evelien Van Hoof
, …
Johan den Dunnen
4
Mar 2
Nomenclature complex variant in the COQ8B gene
Dear Mihai, when there is a large deletion in which part of the deleted region is inserted in an
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Nomenclature complex variant in the COQ8B gene
Dear Mihai, when there is a large deletion in which part of the deleted region is inserted in an
Mar 2
CABEZON MARCO, MARTA
, …
Johan den Dunnen
5
Mar 2
Question about HGVS nomenclature
Dear Mart, following HGVS nomenclature, the JAK2 case can be best described as NC_000009.12:g.[
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Question about HGVS nomenclature
Dear Mart, following HGVS nomenclature, the JAK2 case can be best described as NC_000009.12:g.[
Mar 2