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The Echogenic Bowel

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Explore the clinical significance of an echogenic fetal bowel. This module teaches students to grade bowel brightness and discusses its association with aneuploidy, cystic fibrosis, and intra-amniotic hemorrhage.

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Complete this lesson and pass the quiz to earn 10 Karma Points and move one step closer to your Fetal Aneuploidy Screening Mastery Certification.

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1. What is the prevalence of echogenic bowel in structurally normal fetuses?
0.1% 0.5% 2% 5%
2. How is Grade 1 echogenic bowel best described?
Mild and diffuse Moderate and focal Extreme and bone-like Peritoneal and calcified
3. What is the defining sonographic criterion for Grade 3 echogenic bowel?
Brighter than liver Equal in echogenicity to bone Focal shadowing artifact Dilated with fluid
4. In Grade 3 echogenic bowel, which bony landmark is used as the echogenicity reference?
Femoral diaphysis Cranial vault Iliac bones Scapula
5. Echogenic bowel carries what fold increase in risk for Trisomy 21?
2–3× 4–5× 6–7× 10×
6. What is the approximate absolute aneuploidy risk when echogenic bowel is an isolated finding?
0.1–0.3% 1.4–2% 5–8% 12–15%
7. Which congenital infection group is associated with echogenic bowel?
Toxoplasma only CMV, HSV, and Parvovirus Rubella and Syphilis Listeria and GBS
8. Echogenic bowel must be distinguished from meconium peritonitis. What is the hallmark sonographic feature of meconium peritonitis?
Intraluminal echogenicity Peritoneal calcification Colonic wall thickening Polyhydramnios
9. In the third trimester, hyperechoic intraluminal content is most commonly a normal finding in which bowel segment?
Duodenum Jejunum Ileum Colon
10. Which investigation is NOT part of the standard workup for echogenic bowel?
Maternal CMV serology CF carrier testing Fetal MRI Amniocentesis for karyotype