Two cases of KRT1 mutation-associated epidermolytic ichthyosis without typical epidermolytic hyperkeratosis in the neonatal skin lesions.

Pediatr Dermatol

Department of Dermatology, Gangnam Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.

Published: November 2023

AI Article Synopsis

  • Epidermolytic ichthyosis (EI) is a rare genetic disorder caused by mutations in the KRT1 or KRT10 genes, leading to abnormal skin keratinization.
  • The typical histopathological sign of EI, known as epidermolytic hyperkeratosis (EHK), may not be present in all cases, especially if skin biopsies are taken in early infancy.
  • This report presents two cases of EI with confirmed KRT1 mutations where EHK was not observed in skin biopsies taken within the first week of life.

Article Abstract

Epidermolytic ichthyosis (EI) is a rare genetic disorder of keratinization caused by mutations in either KRT1 or KRT10. Histopathologically, epidermolytic hyperkeratosis (EHK) is a hallmark of EI. Here, we report two EI cases in which KRT1 mutation was confirmed by molecular study, but without typical EHK present on skin biopsies performed within 1 week of age. Our cases demonstrate that EHK may not be evident in EI if skin biopsy is performed during the neonatal period.

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Source
http://dx.doi.org/10.1111/pde.15354DOI Listing

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