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  • Title: Prenatal diagnosis of mosaicism for triploidy and trisomy 13.
    Author: Phelan MC, Curtis Rogers R, Michaelis RC, Moore CL, Blackburn W.
    Journal: Prenat Diagn; 2001 Jun; 21(6):457-60. PubMed ID: 11438949.
    Abstract:
    Mosaicism for trisomy 13 and triploidy was detected by amniocentesis performed at 18 weeks' gestation because of fetal anomalies. Pregnancy continued and a live-born male was delivered vaginally at 37 weeks. The infant had features common to both trisomy 13 and triploidy: intrauterine growth retardation (IUGR), small abnormal ears, cleft palate, and a small jaw. In addition, he had complete cutaneous syndactyly of fingers 3 and 4 and partial syndactyly of the toes, as seen in triploidy. Mixoploidy for trisomy 13 and triploidy was confirmed postnatally in blood, skin, and placenta. Examination of chromosome heteromorphisms and DNA markers suggested the presence of two maternal contributions in the triploid cell line. In addition, the extra chromosome 13 in the trisomic cell line was derived from the mother.
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