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Doctoral Thesis
DOI
https://doi.org/10.11606/T.5.2010.tde-10032010-105027
Document
Author
Full name
Dulce Rondina Guedes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Damiani, Durval (President)
Abdo, Carmita Helena Najjar
Guerra Júnior, Gil
Pieri, Patricia de Campos
Setian, Nuvarte
Title in Portuguese
Estudo investigativo clínico, laboratorial, patológico, morfométrico, molecular de 10 pacientes com pseudohermafroditismo masculino disgenético (ADS 46, XY)
Keywords in Portuguese
Células germinativas
Disgenesia gonadal
Fator esteroidogênico 1
Pseudo-hermafroditismo
Túbulos seminíferos
Abstract in Portuguese
O Pseudohermafroditismo masculino disgenético (Anomalia da diferenciação sexual 46,XY ADS 46,XY) é definido como ambigüidade genital num paciente com testículos e/ou cariótipo 46,XY com uma das seguintes características: alteração histológica testicular, ausência ou hipoplasia das células de Leydig em tecido previamente estimulado com gonadotrofina coriônica humana(hCG), falta de resposta de testosterona ao estímulo com hCG sem acúmulo de precursores, ausência de células germinativas, presença de derivados müllerianos indicando inadequada produção do hormônio antiMülleriano (HAM) ou resistência de seus receptores. Esse estudo apresenta uma avaliação clínica, laboratorial, anátomopatológica, morfométrica e molecular de 10 pacientes com ADS 46,XY; dois pacientes apresentaram mutação no SF1 (fator esteroidogênico 1), duas mutações no domínio hingee uma terceira produziu um stop códon na posição 404; três pacientes com deleção da cópia do DAZ2. A morfometria testicular mostrou todos os diâmetros tubulares médios (DTM) moderado a gravemente diminuídos e os índices de fertilidade tubular leve a moderadamente diminuídos. Devido à dificuldade do diagnóstico diferencial e etiológico, o estudo morfométrico e molecular deve sempre acompanhar esses casos de ADS 46,XY.
Title in English
Clinical, pathological and morphometric study of ten male disgenetic pseudohermaphroditism (DSD 46,XY)
Keywords in English
Germ cells
Gonadal dysgenesis
Pseudohermaphroditism
Seminiferous tubules
Steroidogenic factor-1
Abstract in English
The dysgenetic male pseudohermaphroditism 46,XY ; disorders of sex development (DSD 46,XY) is defined as sexual ambiguity in patients with testis and/or 46,XY karyotype and one of the characteristics: hystologic alteration of the testis; absence or hypoplasia of Leydig cells; a decreased testosterone response to human chorionic gonadotropin stimulation without accumulation of testosterone precursors; absent germ cells; presence of müllerian duct derivatives showing inappropriate production of antimüllerian hormone (AMH) or resistance to its receptors. This study shows the clinic, laboratory, histologic, morphometric and molecular evaluation of 10 patients with DSD 46,XY; two patients showed mutations in the SF1 gene (steroidogenic factor-1); two in the hinge domain and one stop codon at the position 404 of the protein; three patients exhibited deletion of DAZ2. The testis morphometry showed reduction: marked to severe of all mean tubular diameter (MTD) while the reduction of the tubular fertility index (TFI) were slight to marked. Due to difficulties establishing the differential diagnosis and the etiology, the morphometric and molecular evaluation must be always done in the patients with DSD 46,XY.
 
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Publishing Date
2010-03-11
 
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