A novel mutation in the SCN9A gene associated with congenital insensitivity to pain, anhidrosis, and mild cognitive impairment

Author:

Romagnuolo Maurizio12ORCID,Moltrasio Chiara1,Cavalli Riccardo3,Brena Michela3,Tadini Gianluca3ORCID

Affiliation:

1. Dermatology Unit Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy

2. Department of Pathophysiology and Transplantation Università Degli Studi di Milano Milan Italy

3. Pediatric Dermatology Unit, Department of Clinical Sciences and Community Health Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy

Abstract

AbstractCongenital insensitivity to pain (CIP) is a rare phenotype characterized by the inability to perceive pain stimuli with subsequent self‐injuries, whereas CIP associated with anhidrosis (CIPA) is an overlapping phenotype mainly characterized by insensitivity to noxious stimuli and anhidrosis. CIP is primarily associated with pathogenetic variants in the SCN9A gene while CIPA is associated with pathogenetic variants in NGF and NRTK genes. However, in recent years, a significant overlap between these two disorders has been observed highlighting the presence of anhidrosis in SCN9A variants. We report the cases of two siblings (age 4 and 6 years) born from consanguineous parents presenting with a previously undescribed phenotype due to a novel pathogenic variant in SCN9A clinically characterized by congenital insensitivity to pain, anhidrosis, and mild cognitive impairment.

Funder

Ministero della Salute

Publisher

Wiley

Subject

Dermatology,Pediatrics, Perinatology and Child Health

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