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Knobloch syndrome in a large Brazilian consanguineous family: Confirmation of autosomal recessive inheritance

✍ Scribed by Passos-Bueno, M. Rita ;Marie, Suely K. ;Monteiro, Mario ;Neustein, Isaac ;Whittle, Martin R. ;Vainzof, Mariz ;Zatz, Mayana

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 382 KB
Volume: 52
Category: Article
ISSN: 0148-7299
DOI: 10.1002/ajmg.1320520209

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✦ Synopsis

Knobloch syndrome is a rare genetic disorder characterized by high myopia, vitreoretinal degeneration with retinal detachment and occipital cephalocele. The inheritance has been described as autosomal recessive (AR) but in addition to the original report with 5 affected patients [Knobloch and Layer, 19711 only one other family with 2 affected sibs has been described [Czeizel et al., 19921. We have studied a large consanguineous kindred in which there are 12 patients with severe ocular alterations associated with a congenital occipital encephalocele, compatible with the diagnosis of Knobloch syndrome. CT scan and MRI performed in one of the patients, allowed a better understanding of the cranial and ocular alterations in this syndrome. The pattern of occurrence in this highly inbred family clearly confirms autosomal recessive inheritance of Knobloch syndrome.

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