Clinical and molecular characterization of patients with hereditary hemorrhagic telangiectasia: Experience from an HHT Center of Excellence.
Am J Med Genet A
; 185(7): 1981-1990, 2021 07.
Article
in En
| MEDLINE
| ID: mdl-33768677
ABSTRACT
In this retrospective single-center study, we evaluated whether/how pathogenic/likely pathogenic variants of three hereditary hemorrhagic telangiectasia (HHT)-associated genes (ENG, ACVRL1, and SMAD4) are associated with specific clinical presentations of HHT. We also characterized the morphological features of pulmonary arteriovenous malformations (AVMs) in patients with these variants. Pathogenic or likely pathogenic variants were detected in 64 patients. Using nonparametric statistical tests, we compared the type and prevalence of specific HHT diagnostic features associated with these three variants. Pathogenic variants in these genes resulted in gene-specific HHT clinical presentations. Epistaxis was present in 93%, 94%, and 100% of patients with ENG, ACVRL1, and SMAD4 variants, respectively (p = 0.79). Pulmonary AVMs were more common in patients with the ENG variant (p = 0.034) compared with other subgroups. ACVRL1 variant was associated with the lowest frequency of pulmonary AVMs (p = 0.034) but the highest frequency of hepatic AVMs (p = 0.015). Patients with the ACVRL1 variant did not have significantly more pancreatic AVMs compared with the other groups (p = 0.72). ENG, ACVRL1, and SMAD4 pathogenic or likely pathogenic variants are associated with gene-specific HHT presentations, which is consistent with results from other HHT centers.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pulmonary Artery
/
Pulmonary Veins
/
Telangiectasia, Hereditary Hemorrhagic
/
Arteriovenous Fistula
/
Activin Receptors, Type II
/
Smad4 Protein
/
Endoglin
Type of study:
Observational_studies
/
Risk_factors_studies
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Am J Med Genet A
Journal subject:
GENETICA MEDICA
Year:
2021
Type:
Article
Affiliation country:
United States