RESUMENLa Displasia tanatofórica es probablemente la displasia letal más común. Ocurre en aproximadamente en 0,69 por cada 10.000 nacimientos. Su etiología es posiblemente autosómica dominante y resulta de mutaciones nuevas del factor de crecimiento del receptor de los fibroblastos. La patogenia es debida a desorganización del cartílago de crecimiento con persistencia de tejido símil parenquimatoso. Es una condrodisplasia congénita letal caracterizada por el acortamiento de los miembros, hipoplasia torácica, cráneo en hoja de trébol, pliegue simiesco, fémur acortado, estrechamiento torácico, frente prominente, polo cefálico con dimensiones aumentadas aún sin ventriculomegalia y redundancia de las partes blandas.Ademásestá asociado a polihidramnios en un 70 %. Las anomalías asociadas son hidrocefalia, anomalías renales, defecto del tabique auricular, válvula tricúspide anómala, ano imperforado y sinóstosis radio cubital. Se presenta la experiencia de un caso de displasia tanatofórica que se ha podido diagnosticar con la ecografía prenatal. Palabras claves: displasia tanatofórica, malformación fetal, diagnóstico prenatal, ecografía ABSTRACTThanatophoric dysplasia is probably the most common lethal dysplasia. It occurs in about 0.69 of 10,000 births. Its etiologyis dominantand autosomal probabilly dueto new mutations from growth factor receptor fibroblasts. The pathogenesis is dueto disorganization of the growth cartilage with persistente of parenchymal like tissue. It´s a lethal congenital chondrodysplasia characterized by short limbs, thoracichypoplasia, skull cloverleaf, simiancrease, shortened femur, thoracic narrowing, prominent forehead, cephalic pole with increased dimension seven without ventriculomegaly, redundancy of the soft tissues. Also polyhydramniosis associated with in 70% of cases. The associated anomalies are hydrocephalus, kidney abnormalities, atrial septal defect, abnormal tricuspidvalve, imperforateanus which radioulnarsynostosis. The present a case with thanatophoric dysplasia which has been diagnosed with prenatal ultrasound.
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