abnormal number of fetal ribs on 3 dimensional ultrasonography
TRANSCRIPT
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Abnormal Number of Fetal Ribs on 3-Dimensional UltrasonographyAssociated Anomalies and Outcomes in 75 Fetuses
20151030
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Objective.
The purpose of this study was to describe the clinical importance of an abnormal number of fetal ribs.
Methods.
Static 3- or 4-dimensional volume contrast imaging
75 fetuses with an abnormal number of ribs (2004.08-2007.08)
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> 24 < 24
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5 fetuses : the number of ribs at 15 weeks < 22-24 weeks
12 pairs
11+12 12 pairs
13 pairs 12+13
15 24
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5 fetuses : the number of ribs at 15 weeks < 22-24 weeks
12 pairs
11+12 12 pairs
13 pairs 12+13
Reexamination at 22-24 weeks
2415
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75 fetuses with an abnormal number of ribs
53 no additional anomalies
24 with additional anomalies
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All 72 fetuses that continued to birth were alive and well and were not found to be dysmorphic on pediatric examinations.
Only 3 neonates had chest radiography after delivery: 1 for bronchopulmonary sequestration and 2 by maternal request.
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assosiated genetic disease
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assosiated genetic disease
11 rib pairs in neonates with trisomy 21 : 28-33%
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37% of the 75 patients in this study elected to have a karyotype examination
all were normal
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Spondylocostal dysostosis
autosomal recessively inherited
malformations of the vertebral column and ribs
shortened thorax
moderate to severe scoliosis and kyphosis
https://en.wikipedia.org/wiki/Spondylocostal_dysostosis
Jarcho-Levin Syndrome
short trunk and neck
slightly protuberant abdomen
long arms
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RL = -0.5834 + 0.2030 (GA)Rib Length (cm) GA (weeks)
http://onlinelibrary.wiley.com/doi/10.1046/j.1469-0705.1996.07030193.x/pdf
Fetal growthFetal skeletal dysplasia
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32-year-old G2P1 karyotype: Trisomy21
http://onlinelibrary.wiley.com/doi/10.1002/uog.2785/epdf
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Conclusion
(1) in cases of an isolated finding, patients were told that it was most probably a variation of normal
(2) detailed explanations of the limitations of the study were provided to patients
(3) counseling was given according to the additional anomalies that were found
(4) genetic counseling and risk calculation for trisomy 21 were recommended
The ossification process is completed at puberty.