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HGVS Nomenclature
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John Lattier
, …
Johan T den Dunnen
8
Oct 10
Duplications that span the start codon
Dear Raymond, you assume translation will be initiated at the first ATG translation initiation codon.
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Duplications that span the start codon
Dear Raymond, you assume translation will be initiated at the first ATG translation initiation codon.
Oct 10
Heijink, AM (medgen)
, …
Fokkema, Ivo (HG - LUMC)
9
Oct 5
RNA nomenclature for intron retention with two intronic SNVs
Dear Johan, That is incorrect; SVD-WG011 added the use of c. for intronic positions, and did not
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RNA nomenclature for intron retention with two intronic SNVs
Dear Johan, That is incorrect; SVD-WG011 added the use of c. for intronic positions, and did not
Oct 5
Matt Ducar
,
Johan den Dunnen
2
Oct 5
Delins that span the stop codon
Dear Matt, regarding your question, I suggest you ask the devlopers of the Mutalyzer tool first, they
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Delins that span the stop codon
Dear Matt, regarding your question, I suggest you ask the devlopers of the Mutalyzer tool first, they
Oct 5
Evelien Van Hoof
,
Johan den Dunnen
2
Oct 5
nomenclature complex rearrangement
Dear Evelien, probably, when you dive into the HGVS nomenclature recommendations, you might find
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nomenclature complex rearrangement
Dear Evelien, probably, when you dive into the HGVS nomenclature recommendations, you might find
Oct 5
Irina RB
,
Johan den Dunnen
2
Oct 5
cis variants
Dear Irina, for cases like this, see also other discussions in this list, the best description of the
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cis variants
Dear Irina, for cases like this, see also other discussions in this list, the best description of the
Oct 5
Pluto G
, …
Santcroos, Mark (HG - LUMC)
5
Sep 24
Clarification on delins vs. individual descriptions for two cis-phased variants separated by 2 unchanged nucleotides (EGFR exon 19)
For your entertainment, if you go to the development version of mutalyzer at: https://test.mutalyzer.
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Clarification on delins vs. individual descriptions for two cis-phased variants separated by 2 unchanged nucleotides (EGFR exon 19)
For your entertainment, if you go to the development version of mutalyzer at: https://test.mutalyzer.
Sep 24
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
unread,
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.
unread,
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
unread,
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
unread,
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