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Slavotinek, A.M. et al.

A female with complete lack of MÃ¼llerian fusion, postaxial polydactyly, and tetralogy of fallot: genetic heterogeneity of McKusick-Kaufman syndrome or a unique syndrome?

We report a 19-year-old, non-Amish Caucasian female patient with primary amenorrhea caused by complete lack of MÃ¼llerian fusion with vaginal agenesis or MÃ¼llerian aplasia (MA), postaxial polydactyly (PAP), and tetralogy of Fallot. The genital tract anomaly of MA with and without renal or skeletal anomalies comprises Mayer-Rokitansky-Kuster-Hauser syndrome, which has not been reported with tetralogy of Fallot. The phenotypic triad of anomalies most closely resembled McKusick-Kaufman syndrome (MKS; OMIM 236700), a rare multiple congenital anomaly syndrome comprised of hydrometrocolpos (HMC), PAP, and congenital heart malformation that is inherited in an autosomal recessive pattern. While upper reproductive tract anomalies have not been reported with MKS, they have been reported with Bardet-Biedl syndrome (BBS), a syndrome that significantly overlaps with MKS. Both MKS and BBS can be caused by mutations in the MKKS or BBS6 gene on chromosome 20p12 and BBS is also associated with mutations in other genes (BBS1, BBS2, BBS4, and BBS7). To address this heterogenity, we sequenced the causative genes in MKS and BBS but no mutations in these five genes were identified. Fluorescence in situ hybridization (FISH) excluded large deletions of chromosome 20p12 and microsatellite marker studies confirmed biparental inheritance for all of the known BBS loci. The dual midline fusion defects of tetralogy of Fallot and MA suggests that either this patient has a unique syndrome with a distinct genetic etiology or that she has a genetically heterogeneous or variant form of MKS.[1]

References

A female with complete lack of Müllerian fusion, postaxial polydactyly, and tetralogy of fallot: genetic heterogeneity of McKusick-Kaufman syndrome or a unique syndrome? Slavotinek, A.M., Dutra, A., Kpodzo, D., Pak, E., Nakane, T., Turner, J., Whiteford, M., Biesecker, L.G., Stratton, P. Am. J. Med. Genet. A (2004) [Pubmed]

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