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Ultrasound Obstet Gynecol. 2002 May;19(5):523-4.

Sonographic features of anal atresia at 12 weeks.

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1
Department of Obstetrics and Gynaecology, Tsan Yuk Hospital and Department of Pathology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China. yhlam@hkucc.hku.hk

Abstract

Anorectal atresia results from abnormal development of the anorectal septum. Prenatal diagnosis is difficult but the condition may be suspected by the sonographic demonstration of a dilated colon. We present the sonographic features of a fetus with anal atresia and a ventricular septal defect at 12 weeks of gestation. This case illustrates that a dilated colon may be present in association with fetal anal atresia as early as 12 weeks.

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