PubMed · 9654952
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P A Levy. 1998. Amniotic bands.. https://doi.org/10.1542/pir.19-7-249
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Amniotic Band Sequence (ABS) is a disruption sequence that results in a variable group of abnormalities secondary to the disruption process and subsequent deformations. The incidence of ABS ranges from 1:1,200 to 1:15,000 live-born, and is even higher in still-born [Froster and Baird, 1993: Am J Med Genet 46:497-500]. The pathophysiology of ABS remains controversial, but a close look to critical periods of embryogenesis and/or organogenesis has helped in understanding pathogenetic mechanisms leading to the ABS disruption. The abnormalities are typically limited to external structures; however, associated internal malformations as seen in the case reported here may occur [Hunter and Carpenter, 1986: Am J Med Genet 24:691-700]. The prognosis depends on the severity of the abnormalities and the involvement of internal organs [Froster and Baird; 1993: Am J Med Genet 46:497-500; Levy, 1998: Ped Rev 19:249].
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In a 23-week fetus with a large left-sided pleural effusion a double pigtail pleuro-amniotic shunt was inserted uneventfully. A healthy infant was delivered at 38 weeks' gestation. One end of the shunt was in the thoracic cavity but the other end was found wrapped around the upper arm resulting in a constriction band. There was no impairment of the vascular supply to the limb or in its motor or sensory function and by 6 months of age there was only a faint ring still apparent around the upper arm.