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Radiology. 1995 Jan;194(1):217-22.

Trisomy 13 syndrome: prenatal US findings in a review of 33 cases.

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  • 1Department of Radiology, University of Washington, Seattle 98104.

Abstract

PURPOSE:

To determine the type and prevalence of prenatal ultrasound (US) findings in fetuses with trisomy 13.

MATERIALS AND METHODS:

Prenatal US findings in 33 consecutive fetuses with trisomy 13 and in 200 karyotypically normal fetuses were reviewed and compared.

RESULTS:

One or more abnormalities were found in 30 fetuses (91%). Major anomalies detected by means of US included holoprosencephaly (13 [39%]) or other central nervous system anomalies (19 [58%]), facial anomalies (15 [48%]), and renal (11 [33%]) and cardiac (16 [48%]) defects. Growth retardation was also present in 16 (48%). Echogenic chordae tendineae were seen in 10 (30%), which includes seven (39%) of 18 fetuses examined before 20 menstrual weeks (compared with four [2%] of 200 fetuses in the reference group [P < .001]). Other findings not generally associated with trisomy 13 but present in this series included a large cisterna magna (six [18%]), mild cerebral ventricular dilatation (three [9%]), nuchal thickening or cystic hygroma (seven [21%]), and a hypoplastic left side of the heart (seven [21%]).

CONCLUSION:

Prenatal US can help detect one or more anomalies in most fetuses with trisomy 13; thus, US finding can indicate whether karyotype should be tested.

PMID:
7997556
[PubMed - indexed for MEDLINE]
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