1. A Brazilian case of IFAP syndrome with severe congenital ichthyosis and limb malformations caused by a rare variant in MBTPS2.
- Author
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Patricia Migliavacca, Michele, Ambrosio Fock, Rodrigo, Almeida, Nadia, Cavalcanti, Thereza, Villela, Darine, Alvarez Perez, Ana Beatriz, Valle, David, Wohler, Elizabeth, Lygia de Macena Sobreira, Nara, and Raskin, Salmo
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ICHTHYOSIS , *X-linked genetic disorders , *MISSENSE mutation , *HUMAN abnormalities , *SYNDROMES - Abstract
Objective: The classic triad, which defines IFAP syndrome, is ichthyosis follicularis, alopecia, and photophobia. It is a rare X-linked genetic disorder characterized by multiple congenital anomalies with variable severity, caused by pathogenic variants in the MBTPS2 gene, which encodes a zinc metalloprotease that is essential for normal development. This study aimed to report a case of a Brazilian patient with IFAP syndrome presenting skeletal anomalies, which is a rare finding among patients from different families. Case description: We describe a male proband with IFAP syndrome showing severe ichthyosis congenita, cryptorchidism, limb malformation, and comprising the BRESHECK syndrome features. Using whole-exome sequencing, we identified a rare missense variant in hemizygosity in the MBTPS2 gene, which had not been identified in other family members. Comments: This is the first diagnosis of IFAP syndrome in Brazil with a molecular investigation. The present case study thus expands our knowledge on the mutational spectrum of MBPTS2 associated with IFAP syndrome. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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