Bilateral renal agenesis and fetal ascites in association with partial trisomy 13 and partial trisomy 16 due to a 3:1 segregation of maternal reciprocal translocation t(13;16)(q12.3; p13.2).

Abstract	A female fetus with bilateral renal agenesis and fetal ascites was found to have partial trisomy 13 (pter-q12.3) and partial trisomy 16 (p13.2-pter), 47,XX,+der(13)t(13;16)(q12.3; p13.2)mat. The chromosomal aberration was due to a 3:1 segregation with tertiary trisomy transmitted from a maternal reciprocal translocation 13;16. Prenatal ultrasound of a 29-year-old, gravida 2, para 0 woman at 22 gestational weeks showed fetal ascites, severe oligohydramnios and non-visualization of fetal urinary bladder and kidneys. The pregnancy was terminated. At delivery, the proband displayed dysmorphic features of hypertelorism, a prominent glabella, epicanthic fold, a stubby nose with a depressed nasal bridge, anteverted nares, thin lips, micrognathia, low-set ears, a short neck and a distended abdomen. Necropsy confirmed bilateral renal agenesis and ascites. A cytogenetic study performed on fibroblasts obtained from the proband's skin revealed an extra supernumerary chromosome. The mother was later found to have a reciprocal translocation. Fluorescence in situ hybridization for a submicroscopic deletion in chromosome 22q11 in the proband was negative. The parents had no urological anomalies. Our observation further extends the clinical spectrum associated with proximal trisomy 13q and distal trisomy 16p. We suggest prenatal cytogenetic analysis in fetuses with urological anomalies, including renal agenesis, to uncover underlying genetic disorders.
Authors	C P Chen, S R Chern, C C Lee, D D Town, W L Chen, W Wang
Journal	Prenatal diagnosis (Prenat Diagn) Vol. 19 Issue 8 Pg. 783-6 (Aug 1999) ISSN: 0197-3851 [Print] England
PMID	10451531 (Publication Type: Case Reports, Journal Article)
Copyright	Copyright 1999 John Wiley & Sons, Ltd.
Topics	Abortion, Induced Adult Ascites (embryology) Chromosome Aberrations (diagnostic imaging) Chromosome Disorders Chromosomes, Human, Pair 13 Chromosomes, Human, Pair 16 Female Humans Kidney (abnormalities, diagnostic imaging, embryology) Oligohydramnios Pregnancy Translocation, Genetic Trisomy Ultrasonography, Prenatal

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