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PubMed · 9880722

Covered exstrophy: a rare variant.

S S Borwankar·L S Kasat·A Naregal·M Jain·R Bajaj
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Abstract

A case of covered exstrophy without sequestration of a bowel segment is reported. A 4-year-old female presented with dribbling of urine. Treatment to date has been simple excision of the covered membrane with functional closure of the bladder and bilateral posterior iliac osteotomies, with reconstruction of the bladder neck and genitalia to be performed at a later date. The embryogenesis of this rare variant, a review of the reported cases, and management options are discussed. Keyword Covered exstrophy. Exstrophy. Bladder variants

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Bladder ExstrophyChild, PreschoolFemaleHumansCase ReportsJournal ArticleReview

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S S Borwankar, L S Kasat, A Naregal, M Jain, R Bajaj. 1998. Covered exstrophy: a rare variant.. https://doi.org/10.1007/s003830050460

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PubMed2006

MTHFR 677 TT genotype in a mother and her child with Down syndrome, atrioventricular canal and exstrophy of the bladder: implications of a mutual genetic risk factor?

Apart from Husmann and Vandersteen [in: Gearhart JP, Matthews R (eds) The Epispadias-Exstrophy Complex. Kluwer, New York, pp 199-206, 1999], we report only the second case of Down syndrome (DS) associated with exstrophy of the bladder (EB). Besides the appearance of DS, the newborn exhibited a complete atrioventricular canal (CAVC) and classical EB, including diastases of the symphysis, an epispadic penis and an open bladder plate. Despite current recommendations, the mother had not supplemented her intake of folic acid during the periconceptional period. In a comparable case, Al-Gazali et al. (Am J Med Genet 103:128-132, 2001) found the homozygous 677T allele of the methylenetetrahydrofolate (MTHFR) gene 677C-->T polymorphism in a mother and her child with DS and cervical meningomyelocele. They found that the mother, who also had not supplemented her folic acid intake, had a secondarily altered folate status with an increased homocysteine level, suggesting that the homozygous TT mutation in the MTHFR gene in both mother and her child had contributed to the presentation of DS and a neural tube defect. The combined clinical findings of the present case and the observations of Al-Gazali et al. led us to investigate the 677C-->T polymorphism in our mother-child pair. Likewise we found that mother and child were homozygous for the mutant 677T allele. Our findings support the suggestion of Al-Gazali et al. that the MTHFR 677TT could be a mutual genetic risk factor for the co-occurrence of trisomy 21 and midline defects, the risk of which may be reduced by periconceptional folic acid supplementation.

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