Brains and faces in holoprosencephaly: pre- and postnatal description of 30 cases
Article first published online: 12 DEC 2002
Copyright © 2002 ISUOG
Ultrasound in Obstetrics & Gynecology
Volume 19, Issue 1, pages 24–38, January 2002
How to Cite
Blaas, H.-G. K., Eriksson, A. G., Salvesen, K. Å., Isaksen, C. V., Christensen, B., Møllerløkken, G. and Eik-Nes, S. H. (2002), Brains and faces in holoprosencephaly: pre- and postnatal description of 30 cases. Ultrasound Obstet Gynecol, 19: 24–38. doi: 10.1046/j.0960-7692.2001.00154.x
- Issue published online: 12 DEC 2002
- Article first published online: 12 DEC 2002
- Manuscript Accepted: 19 OCT 2001
- Cited By
- Fronto-nasal dysplasia;
- Median cleft lip and palate;
- Prenatal ultrasound;
- Single nostril
To investigate the prenatal appearance of the holoprosencephaly spectrum.
A database of 1750 fetuses with congenital anomalies identified by ultrasound was prospectively collected from 1987 to 2000. Among them, 30 cases (1.7%) with holoprosencephaly were prenatally identified and described.
The prevalence of holoprosencephaly in the Health Region of the National Center for Fetal Medicine in Norway was 1.26: 10 000; the sex distribution (male: female) was 1.4: 1. Holoprosencephaly was found in one dichorionic twin pregnancy and one pair of conjoined twins. Among the 30 cases of holoprosencephaly, 18 were alobar, five were semilobar, two were lobar, two were lobar variants, and three were anencephalic. The facial features varied considerably. Sixty-seven per cent (20/30) had associated structural anomalies that were not related to the cerebral and facial holoprosencephaly condition. Thirty-seven per cent (11/30) had detectable chromosome aberrations and 23% (7/30) had nonchromosomal syndromal origin. The size or shape of the head was abnormal in 83% (25/30) of holoprosencephaly cases.
This study indicates that holoprosencephaly represents a heterogeneous entity with different etiologies and clinical appearances. The fact that holoprosencephaly features are found associated with particular conditions such as fronto-nasal dysplasia (2/30; 6.7%), agnathia-otocephaly (3/30; 10%), and anencephaly (3/30; 10%), suggests that these may be underreported conditions in other large holoprosencephaly series. Copyright © 2002 ISUOG