Description
This gene panel covers the following disorders: 
- Hereditary haemorrhagic telangiectasia
- Familial and multiple pulmonary arteriovenous malformations

Please see the eligibility statements for the individual disorders for more details.

Hereditary haemorrhagic telangiectasia eligibility statement:

Hereditary haemorrhagic telangiectasia inclusion criteria (33501)
Three or more of:
1)	Nosebleeds from nasal telangiectasia
2)	Mucocutaneous telangiectasia 
3)	Visceral telangiectasia such as pulmonary, cerebral, hepatic AVMs or gastrointestinal telangiectasia
4)	First degree relative with HHT

Individuals with syndromic disease should be recruited according to standard guidance, typically as trios. Disease status of apparently unaffected participants should be determined according to standard clinical practice to detect cryptic disease.

In other cases, unaffected individuals should not be recruited. Recruitment in such families should favour multiplex families over single isolated cases. These singleton recruits will not contribute to the overall singleton monitoring metrics applied to GMCs.

Hereditary haemorrhagic telangiectasia exclusion criteria (33501)

Prior genetic testing guidance (33501)
- Results should have been reviewed for all genetic tests undertaken, including disease-relevant genes in exome sequencing data. The patient is not eligible if they have a molecular diagnosis for their condition. 
- Genetic testing should continue according to routine local practice for this phenotype regardless of recruitment to the project; results of these tests must be submitted via the ‘Genetic investigations’ section of the data capture tool to allow comparison of WGS with current standard testing.  

PLEASE NOTE: The sensitivity of WGS compared to current diagnostic genetic testing has not yet been established. It is therefore important that tests which are clinically indicated under local standard practice continue to be carried out.

Hereditary haemorrhagic telangiectasia prior genetic testing genes (33501)
Testing of the following genes should be carried out PRIOR TO RECRUITMENT where this is in line with current local practice: 
 ENG, ACVRL1, and SMAD4

Closing statement (33501)
These requirements will be kept under continual review during the main programme and may be subject to change.

4 reviewers

  • Ellen McDonagh (Genomics England Curator)

    Group: other
    Workplace: other

  • Claire Shovlin (Imperial College London)

    Group: GeCIP domain
    Workplace: NHS clinical service

  • Sarah Leigh (Genomics England Curator)

    Group: Other
    Workplace: Other

  • Louise Daugherty (Genomics England Curator)

    Group: Other
    Workplace: Other

13 Entities

13 reviewed, 3 green

List Entity Reviews Mode of inheritance Details
13 Entitiess
Green Green List (high evidence)
ACVRL1
2 reviews
1 green
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Eligibility statement prior genetic testing
  • Emory Genetics Laboratory
  • Expert Review Green
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Telangiectasia, hereditary hemorrhagic, type 2 600376
  • epistaxis
  • telangiectasia
  • hepatic arteriovenous malformation
  • pulmonary arteriovenous malformation
  • cerebral pulmonary arteriovenous malformation
  • pulmonary arterial hypertension
Tags
Green Green List (high evidence)
ENG
2 reviews
1 green
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Eligibility statement prior genetic testing
  • Emory Genetics Laboratory
  • Expert Review Green
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Telangiectasia, hereditary hemorrhagic, type 1 187300
Tags
Green Green List (high evidence)
SMAD4
2 reviews
1 green
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Eligibility statement prior genetic testing
  • Emory Genetics Laboratory
  • Expert Review Green
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome, 175050
Tags
Amber Amber List (moderate evidence)
GDF2
3 reviews
1 red
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Emory Genetics Laboratory
  • Expert Review
  • Expert Review Amber
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Telangiectasia, hereditary hemorrhagic, type 5 615506
Tags
Red Red List (low evidence)
ATM
2 reviews
1 red
BIALLELIC, autosomal or pseudoautosomal
Sources
  • Expert Review Red
  • Illumina TruGenome Clinical Sequencing Services
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Ataxia-telangiectasia, 208900
Tags
Red Red List (low evidence)
ATR
2 reviews
1 red
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Expert Review Red
  • Radboud University Medical Center, Nijmegen
Phenotypes
  • Cutaneous telangiectasia and cancer syndrome, familial, 614564 (biallelic)
Tags
Red Red List (low evidence)
FOXF1
3 reviews
1 red
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Expert Review Red
  • Illumina TruGenome Clinical Sequencing Services
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Alveolar capillary dysplasia with misalignment of pulmonary veins 265380
Tags
Red Red List (low evidence)
KRIT1
3 reviews
1 red
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Emory Genetics Laboratory
  • Expert Review Red
  • Illumina TruGenome Clinical Sequencing Services
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Cavernous malformations of CNS and retina 116860
  • Cerebral cavernous malformations-1 116860
  • Hyperkeratotic cutaneous capillary-venous malformations associated with cerebral capillary malformations 116860
Tags
Red Red List (low evidence)
MRE11
3 reviews
1 red
BIALLELIC, autosomal or pseudoautosomal
Sources
  • Expert Review Red
  • Illumina TruGenome Clinical Sequencing Services
  • Radboud University Medical Center, Nijmegen
  • UKGTN
Phenotypes
  • Ataxia-telangiectasia-like disorder, 604391
Tags
Red Red List (low evidence)
PIK3CA
3 reviews
1 red
Unknown
Sources
  • Expert Review Red
  • UKGTN
Phenotypes
  • Congenital Lipomatous Overgrowth, Vascular Malformations, and Epidermal Nevi
  • Megalencephaly-Capillary Malformation-Polymicrogyria Syndrome
Tags
Red Red List (low evidence)
RASA1
3 reviews
1 red
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Emory Genetics Laboratory
  • Expert Review Red
  • Illumina TruGenome Clinical Sequencing Services
  • Radboud University Medical Center, Nijmegen
Phenotypes
  • Capillary malformation-arteriovenous malformation 608354
Tags
Red Red List (low evidence)
SOX18
2 reviews
1 red
BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Sources
  • Expert Review Red
  • Radboud University Medical Center, Nijmegen
Phenotypes
  • Hypotrichosis-lymphedema-telangiectasia syndrome, 607823
  • Hypotrichosis-lymphedema-telangiectasia-renal defect syndrome 137940
Tags
Red Red List (low evidence)
TEK
3 reviews
1 red
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
  • Expert Review Red
  • Illumina TruGenome Clinical Sequencing Services
  • Radboud University Medical Center, Nijmegen
Phenotypes
  • Venous malformations, multiple cutaneous and mucosal 600195
Tags

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