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First-trimester diagnosis of imperforate anus.
P Taipale1, L Rovamo, V Hiilesmaa
1Department of Obstetrics and Gynecology, Hyvinkää Hospital, Hyvinkää, Finland. pekka.taipale@hus.fi
Summary
Prenatal ultrasound can detect imperforate anus (a congenital condition) by identifying a dilated colon. This finding aids in diagnosing anorectal atresia, even when isolated.
Area of Science:
- Medical imaging
- Fetal medicine
- Pediatric surgery
Background:
- Imperforate anus, or anorectal atresia, is a congenital condition that can occur in isolation or with other fetal abnormalities.
- Prenatal diagnosis of imperforate anus is challenging.
- Ultrasound can assist in prenatal diagnosis by detecting a dilated distal bowel or rectum.
Observation:
- A fetus at 12 weeks gestation exhibited a dilated colon on ultrasound.
- Colonic dilatation was consistently observed in the first and third trimesters.
- Detection of colonic dilatation was more difficult during the second trimester.
Findings:
- The observed fetal colonic dilatation was indicative of imperforate anus.
- The newborn was diagnosed with a low type of imperforate anus postnatally.
Implications:
- Early and accurate prenatal diagnosis of imperforate anus can be achieved through serial ultrasound monitoring.
- Identifying fetal structural defects like imperforate anus facilitates timely intervention and improved neonatal outcomes.
- This case highlights the utility of ultrasound in diagnosing isolated anorectal atresia.