ABSTRACT
Abstract Inherited Palmoplantar Keratodermas are rare disorders of genodermatosis that are conventionally regarded as autosomal dominant in inheritance with extensive clinical and genetic heterogeneity. This is the first report of a unique autosomal recessive Inherited Palmoplantar keratoderma -sensorineural hearing loss syndrome which has not been reported before in 3 siblings of a large consanguineous family. The patients presented unique clinical features that were different from other known Inherited Palmoplantar Keratodermas -hearing loss syndromes. Mutations in GJB2 or GJB6 and the mitochondrial A7445G mutation, known to be the major causes of diverse Inherited Palmoplantar Keratodermas -hearing loss syndromes were not detected by Sanger sequencing. Moreover, the pathogenic mutation could not be identified using whole exome sequencing. Other known Inherited Palmoplantar keratoderma syndromes were excluded based on both clinical criteria and genetic analysis.
Subject(s)
Humans , Male , Child , Adolescent , Keratoderma, Palmoplantar/genetics , Keratoderma, Palmoplantar/pathology , Hearing Loss, Sensorineural/genetics , Hearing Loss, Sensorineural/pathology , Mutation/genetics , Syndrome , Biopsy , Siblings , Exome SequencingABSTRACT
Mal de Meleda é uma ceratodermia palmoplantar transgressiva rara, com prevalência estimada de 1:100.000 habitantes, descrita em 1826 por Stulli, na Ilha de Meleda. A herança autossômica recessiva foi descrita em 1938 e a alteração gênica no lócus 8qter, documentada em 1998. As principais manifestações clínicas decorrem da alteração da ceratinização palmoplantar. Há intensa hiperceratose transgressiva com eritema também no dorso das mãos e pés com distribuição em luvas e botas O aconselhamento genético faz-se necessário, sobretudo nos casos de consanguinidade. Nosso objetivo é relatar 2 casos de ocorrência familiar de pais consanguíneos.
Mal de Meleda is a rare transgressive palmoplantar keratoderma with an estimated prevalence of 1 in 100,000 individuals. It was first described in 1826 by Stulli on the island of Mljet. Its autosomal recessive inheritance was described in 1938, and the defective gene was localized to chromosome 8qter in 1998. Clinical features are the result of abnormal palmoplantar keratinization and include severe symmetrical transgressive hyperkeratosis and erythema of the feet and hands in a glove-and-sock pattern. Genetic counseling is mandatory in cases of consanguinity. We report two cases of familial occurrence in the offspring of consanguineous parents.
Subject(s)
Aged , Female , Humans , Middle Aged , Keratoderma, Palmoplantar/pathology , Consanguinity , Diagnosis, Differential , Keratoderma, Palmoplantar , SyndromeABSTRACT
A tilose palmo-plantar é um distúrbio autossômico dominante caracterizado por uma hiperceratose palmo-plantar. Em geral, desenvolve-se na segunda infância e se acentua em áreas de pressão. Existem duas formas familiares de tilose palmo-plantar: a não epidermolítica e a epidermolítica. Os pacientes com tilose palmo-plantar forma epidermolítica apresentam uma chance até 40 por cento maior de desenvolver carcinoma de células escamosas do esôfago. A associação de tilose palmo-plantar com neoplasia esofágica é denominada síndrome de Howel-Evans.
Tylosis palmoplantaris is an autosomal dominant disorder characterized by hyperkeratosis of palms and soles. Lesions start during childhood and are more evident in areas of pressure. Familial tylosis palmoplantaris comprises two forms: epidermolytic and non-epidermolytic. Patients with the epidermolytic variant have up to 40 percent higher chance of developing squamous cell carcinoma of the esophagus. The association of tylosis palmoplantaris with esophageal cancer is called Howel-Evans syndrome.