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  • Title: Multiple congenital anomalies in a fetus with 45,X/46,X,r(X)(p11.22q12) mosaicism.
    Author: Nowaczyk MJ, Ramsay JA, Mohide P, Tomkins DJ.
    Journal: Am J Med Genet; 1998 May 26; 77(4):306-9. PubMed ID: 9600741.
    Abstract:
    Ring X chromosomes that do not undergo inactivation may cause malformations and mental retardation. We report on a fetus with anencephaly, total dorsal rachischisis, and diaphragmatic hernia that was found to have a mosaic 45,X/46,X,r(X)(p11.22q12) karyotype. Fluorescent in situ hybridization (FISH) confirmed that the ring chromosome was X-derived. This report expands the phenotypic spectrum of mosaic monosomy X and small ring X chromosomes.
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