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Expanding the Phenotype of Hereditary Congenital Facial Paresis Type 3.

ABSTRACT: The HOXB1 gene encodes a homeobox transcription factor pivotal in the development of rhombomere 4. Biallelic pathogenic variants in this gene are associated with congenital facial paresis type 3 (HCFP3). Only seven single nucleotide variants have been reported in the literature to date. Here, we report a 27-year-old female with a unique presentation of HCFP3 with two novel compound-heterozygous missense variants: c.763C>G, p.(Arg255Gly), which arose de novo and an inherited c.781C>T, p.(Arg261Cys) variant. The patient exhibited HCFP3 symptoms with mild upward esodeviation and lacked the documented ear malformations common in HCFP. For many years, she was misdiagnosed with facio-scapulo-humeral muscular dystrophy, due to complaints of shoulder girdle and neck muscle weakness. No alternative genetic or acquired causes of neck and shoulder girdle weakness were found, suggesting its potential inclusion in the phenotypic spectrum.

SUBMITTER: Murtazina A 

PROVIDER: S-EPMC10779017 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature

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Expanding the Phenotype of Hereditary Congenital Facial Paresis Type 3.

Murtazina Aysylu A   Borovikov Artem A   Kuchina Anna A   Ovsova Olga O   Bulakh Maria M   Chukhrova Alena A   Braslavskaya Svetlana S   Ryzhkova Oksana O   Skryabin Nikolay N   Kutsev Sergey S   Dadali Elena E  

International journal of molecular sciences 20231221 1

The <i>HOXB1</i> gene encodes a homeobox transcription factor pivotal in the development of rhombomere 4. Biallelic pathogenic variants in this gene are associated with congenital facial paresis type 3 (HCFP3). Only seven single nucleotide variants have been reported in the literature to date. Here, we report a 27-year-old female with a unique presentation of HCFP3 with two novel compound-heterozygous missense variants: c.763C>G, p.(Arg255Gly), which arose de novo and an inherited c.781C>T, p.(A  ...[more]

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