title: Prenatal diagnosis of holoprosencephaly in two fetuses with der (7)t(1;7)(q32;q32)pat inherited from the father with double translocations.
abstract: The presence of two independent translocations in one person is rare. Herein, we report the prenatal diagnosis of two sibling fetuses with holoprosencephaly, whose father is a carrier of double translocations. The karyotype of the father is 46,XY, t(1;7) (q32;q32), t(14,15) (q32.1;q26.3). The two fetuses had variable facial dysmorphisms and identical cytogenetic abnormality-a derivative (7) t(1;7) (q32;q32) inherited from the father. The proband 1 showed a small mouth, a single median eye and a proboscis above the eye, while the proband 2 showed hypotelorism, a flat nose, cleft lip and cleft palate. Both fetuses also had alobar holoprosencephaly. Haploinsufficiency of the sonic hedgehog gene at 7q36 does account for the occurrence of holoprosencephaly in the two fetuses with a deletion of distal 7q (7q32 --> qter).
authors.affiliation: Department of Obstetrics and Gynecology, National Cheng Kung University Medical College and Hospital, 138 Victory Road, Tainan, Taiwan.
authors.forename: Louise
authors.initials: L
authors.lastname: Chuang
authors.forename: Pao-Lin
authors.initials: PL
authors.lastname: Kuo
authors.forename: Hsiao-Bai
authors.initials: HB
authors.lastname: Yang
authors.forename: Chung-Ho
authors.initials: CH
authors.lastname: Chien
authors.forename: Pei-Yi
authors.initials: PY
authors.lastname: Chen
authors.forename: Chiung-Hsin
authors.initials: CH
authors.lastname: Chang
authors.forename: Fong-Ming
authors.initials: FM
authors.lastname: Chang
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D000025:Abortion, Eugenic; D000328:Adult; D002897:Chromosomes, Human, Pair 7; D005220:Fathers; D005260:Female; D040941:Heredity / Q000235:genetics*; D006579:Heterozygote; D016142:Holoprosencephaly / Q000175:diagnosis / Q000235:genetics*; D006801:Humans; D008297:Male; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*; D032681:Spectral Karyotyping; D014178:Translocation, Genetic