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Things come in threes: A new complex allele and a novel deletion within the CFTR gene complicate an accurate diagnosis of cystic fibrosis

BACKGROUND: Despite consolidated guidelines, the clinical diagnosis and prognosis of cystic fibrosis (CF) is still challenging mainly because of the extensive phenotypic heterogeneity and the high number of CFTR variants, including their combinations as complex alleles. RESULTS: We report a family w...

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Detalles Bibliográficos
Autores principales: Persico, Ilaria, Feresin, Agnese, Faleschini, Michela, Fontana, Giorgia, Sirchia, Fabio, Faletra, Flavio, La Bianca, Martina, Suergiu, Sarah, Morgutti, Marcello, Maschio, Massimo, D'Adamo, Adamo Pio, Raraigh, Karen S., Savoia, Anna, Bottega, Roberta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9184661/
https://www.ncbi.nlm.nih.gov/pubmed/35348309
http://dx.doi.org/10.1002/mgg3.1926
Descripción
Sumario:BACKGROUND: Despite consolidated guidelines, the clinical diagnosis and prognosis of cystic fibrosis (CF) is still challenging mainly because of the extensive phenotypic heterogeneity and the high number of CFTR variants, including their combinations as complex alleles. RESULTS: We report a family with a complicated syndromic phenotype, which led to the suspicion not only of CF, but of a dominantly inherited skeletal dysplasia (SD). Whereas the molecular basis of the SD was not clarified, segregation analysis was central to make a correct molecular diagnosis of CF, as it allowed to identify three CFTR variants encompassing two known maternal mutations and a novel paternal microdeletion. CONCLUSION: This case well illustrates possible pitfalls in the clinical and molecular diagnosis of CF; presence of complex phenotypes deflecting clinicians from appropriate CF recognition, and/or identification of two mutations assumed to be in trans but with an unconfirmed status, which underline the importance of an in‐depth molecular CFTR analysis.