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1.
J Cutan Pathol ; 47(6): 524-529, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32045015

RESUMO

BACKGROUND: Epidermolytic acanthoma (EA) is a rare acquired lesion demonstrating a characteristic histopathological pattern of epidermal degeneration referred to as epidermolytic hyperkeratosis (EHK). On histopathological analysis, EA appears nearly identical to inherited EHK-associated dermatoses such as epidermolytic ichthyosis and ichthyosis bullosa of Siemens. While it has been speculated that EA is caused by mutations in KRT10, KRT1, or KRT2 found in these inherited dermatoses, none have yet been identified. Herein, we aim to identify the contributions of keratin mutations to EA. METHODS: Using genomic DNA extracted from paraffin-embedded samples from departmental archives, we evaluated a discovery cohort using whole-exome sequencing (WES) and assessed remaining samples using Sanger sequencing screening and restriction fragment length polymorphism (RFLP) analysis. RESULTS: DNA from 16/20 cases in our sample was of sufficient quality for polymerase chain reaction amplification. WES of genomic DNA from lesional tissue revealed KRT10 c.466C > T, p.Arg156Cys mutations in 2/3 samples submitted for examination. RFLP analysis of these samples as well as eight additional samples confirmed the mutations identified via WES and identified four additional cases with Arg156 mutations. In sum, 6/11 screened cases showed hotspot mutation in KRT10. CONCLUSIONS: Hotspot mutations in the Arg156 position of KRT10, known to cause epidermolytic ichthyosis, also underlie EA.


Assuntos
Acantoma/congênito , Hiperceratose Epidermolítica/genética , Queratina-10/genética , Neoplasias Cutâneas/patologia , Acantoma/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Genômica/métodos , Humanos , Hiperceratose Epidermolítica/patologia , Ictiose Bolhosa de Siemens/patologia , Queratinas/genética , Masculino , Pessoa de Meia-Idade , Mutação , Sequenciamento do Exoma/métodos
5.
Pediatr Dermatol ; 30(4): 469-72, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-22612346

RESUMO

Superficial epidermolytic ichthyosis (SEI), previously known as ichthyosis bullosa of Siemens, is a rare genetic skin condition, characterized by blisters and hyperkeratosis. It can be easily confused with epidermolytic hyperkeratosis, known now as epidermolytic ichthyosis, and genetic testing can be helpful in differentiating between the two conditions. We describe two children with SEI confirmed by genetic testing, including one with a novel mutation. We also describe other affected family members with SEI.


Assuntos
Hiperceratose Epidermolítica/diagnóstico , Hiperceratose Epidermolítica/genética , Ictiose Bolhosa de Siemens/diagnóstico , Ictiose Bolhosa de Siemens/genética , Queratina-2/genética , Pré-Escolar , Diagnóstico Diferencial , Saúde da Família , Feminino , Genes Dominantes , Heterozigoto , Humanos , Masculino
10.
Pediatr Dermatol ; 27(6): 653-4, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-21510005

RESUMO

Ichthyosis bullosa of Siemens is a genodermatosis, which presents in childhood with mild blistering and hyperkeratosis. The heterogeneous clinical presentation may lead to misdiagnosis, even in the presence of a strong family history. Genetic testing and counselling may help in diagnosis and treatment.


Assuntos
Vesícula/patologia , Saúde da Família , Ictiose Bolhosa de Siemens/patologia , Ceratose/patologia , Biópsia , Criança , Humanos , Lactente , Masculino
15.
Annals of Dermatology ; : 211-214, 1997.
Artigo em Inglês | WPRIM (Pacífico Ocidental) | ID: wpr-70672

RESUMO

Few cases of ichthyosis bullosa of Siemens(IBS) have been reported since 1939, as a distinct entity from bullous congenital ichthyosiform erythroderma(BCIE). IBS can be differentiated from BCIE by the absence of congenital erythroderma and a different distribution of involved skin area. It's characteristic features include blistering, superficial erosion or moulting of the outer skin. Histological features are tonofilaments aggregation confined to the granular and upper spinous layer of the epidermis. However, in BCIE these findings are present in the whole suprabasal compartment. The original reports of Siemens and cases from other authors showed an autosomal dominant inheritance. Our patient developed IBS sporadically without a familial background.


Assuntos
Humanos , Vesícula , Dermatite Esfoliativa , Epiderme , Ictiose Bolhosa de Siemens , Ictiose , Filamentos Intermediários , Muda , Pele , Testamentos
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