PMID- 9602489 OWN - NLM STAT- MEDLINE DCOM- 19980717 LR - 20161124 IS - 0197-3851 (Print) IS - 0197-3851 (Linking) VI - 18 IP - 4 DP - 1998 Apr TI - Prenatal diagnosis of de novo isochromosome 13q associated with microcephaly, alobar holoprosencephaly and cebocephaly in a fetus. PG - 393-8 AB - We report on the prenatal diagnosis, genetic studies, and pathology of a case with de novo isochromosome 13q. A 31-year-old primigravida was referred for genetic counselling at 26 weeks' gestation due to the sonographic findings of intrauterine growth retardation and microcephaly. Level II ultrasonograms further demonstrated alobar holoprosencephaly, hypotelorism, polydactyly, a ventricular septal defect, and a single nostril. A diagnosis of cebocephaly was made. Genetic amniocentesis and cord blood sampling revealed translocation trisomy 13 with a de novo t(13q13q) rearrangement. Chromosomal analysis using G- and C-banding techniques and fluorescence in situ hybridization (FISH) showed an apparent monocentric isochromosome. Molecular analyses using polymorphic molecular markers showed that the rearrangement was consistent with an isochromosome of maternal chromosome 13q[46,XX,i(13)(q10)]. Necropsy confirmed cebocephaly and the prenatally detected anomalies. FAU - Chen, C P AU - Chen CP AD - Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China. FAU - Chern, S R AU - Chern SR FAU - Lee, C C AU - Lee CC FAU - Chen, L F AU - Chen LF FAU - Chuang, C Y AU - Chuang CY FAU - Chen, M H AU - Chen MH LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Prenat Diagn JT - Prenatal diagnosis JID - 8106540 SB - IM MH - Adult MH - Amniocentesis MH - *Chromosomes, Human, Pair 13 MH - Craniofacial Abnormalities/*diagnostic imaging MH - Female MH - Gestational Age MH - Holoprosencephaly/diagnostic imaging MH - Humans MH - In Situ Hybridization, Fluorescence MH - *Isochromosomes MH - Karyotyping MH - Microcephaly/diagnostic imaging MH - Pregnancy MH - *Ultrasonography, Prenatal EDAT- 1998/05/29 02:02 MHDA- 2000/06/20 09:00 CRDT- 1998/05/29 02:02 PHST- 1998/05/29 02:02 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1998/05/29 02:02 [entrez] AID - 10.1002/(SICI)1097-0223(199804)18:4<393::AID-PD277>3.0.CO;2-Q [pii] PST - ppublish SO - Prenat Diagn. 1998 Apr;18(4):393-8.