Case #22
Subject:
Embryology
A 27-year-old woman comes to the physician for a routine examination. She is 32 weeks‘ pregnant.
A routine ultrasound is done co visualize the dimensions and evaluate the overall health of the
baby. The baby's abdominal contents are protruding through the abdominal wall, just lateral to the
umbilicus into the amniotic fluid. The physician decides to continue with the pregnancy and
operate on the child after it is born. Which of the following is the most likely embryological defect
leading to this pathology in the embryo?
A. Caudal fold closure defect
B. Dorsal fold closure defect
C. Improper migration of neural crest cells
D. Lateral fold closure defect
E. Rostral fold closure defect
Medcloud™
Case #22
Subject:
Embryology
Medcloud™
Case #22
Subject:
Embryology
The correct answer is D
On ultrasound the fetus has an exposed abdomen with its contents protruded outside the
cavity wall. Improper closure of the lateral fold leads to gastroschisis or omphalocele. The
difference being that an omphalocele is still surrounded by peritoneum.
Medcloud™
Case #23
Subject:
Embryology
A premature newborn has abdominal contents protruding from the abdominal cavity. The contents
are covered by peritoneum and amnion. Which of the following is the most likely diagnosis?
A. Gastroschisis
B. Omphalocele
C. Meningocele
D. Myelomeningocele
E. Tracheoesophageal fistula
Medcloud™
Case #23
Subject:
Embryology
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