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  • Title: Structural chromosomal mosaicism and prenatal diagnosis.
    Author: Pipiras E, Dupont C, Chantot-Bastaraud S, Siffroi JP, Bucourt M, Batallan A, Largillière C, Uzan M, Wolf JP, Benzacken B.
    Journal: Prenat Diagn; 2004 Feb; 24(2):101-3. PubMed ID: 14974115.
    Abstract:
    True structural chromosomal mosaicism are rare events in prenatal cytogenetics practice and may lead to diagnostic and prognostic problems. Here is described the case of a fetus carrying an abnormal chromosome 15 made of a whole chromosome 2p translocated on its short arm in 10% of the cells, in association with a normal cell line. The fetal karyotype was 46,XX,add(15)(p10).ish t(2;15)(p10;q10)(WCP2+)[3]/46,XX[27]. Pregnancy was terminated and fetus examination revealed a growth retardation associated with a dysmorphism including dolichocephaly, hypertelorism, high forehead, low-set ears with prominent anthelix and a small nose, which were characteristic of partial trisomy 2p. Possible aetiologies for prenatal mosaicism involving a chromosomal structural abnormality are discussed.
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