Intermediate Lesser Sac Quiz

Q1. Which structure forms the anterior boundary of the epiploic foramen at the entrance to the lesser sac?

• Caudate lobe
• Inferior vena cava
• First part of the duodenum
• Hepatoduodenal ligament

Q2. Which structure forms the posterior boundary of the epiploic foramen?

• Abdominal aorta
• Portal vein
• Splenic artery
• Inferior vena cava

Q3. Which structure forms the superior boundary of the epiploic foramen?

• Left kidney
• Gallbladder
• Caudate lobe of the liver
• Pancreatic head

Q4. Which structure forms the inferior boundary of the epiploic foramen?

• Jejunum
• Transverse colon
• Third part of the duodenum
• First part of the duodenum

Q5. Which arteries are closely related to the posterior wall region of the lesser sac along the superior border of the pancreas?

• Inferior mesenteric artery
• External iliac artery
• Inferior epigastric artery
• Splenic artery

Q6. Which vessels are related to the posterior wall of the lesser sac near the pancreas?

• Inferior epigastric vessels
• Internal pudendal vessels
• Splenic vessels
• Femoral vessels

Q7. How can surgeons commonly enter the lesser sac from the anterior abdominal approach?

• Through the gastrocolic ligament
• Through the inguinal ligament
• Through the falciform ligament into the liver
• Through the renal capsule

Q8. What happens to the embryonic inferior recess of the lesser sac within the greater omentum?

• It becomes the urinary bladder
• It is largely obliterated by fusion of greater omental layers
• It forms the pleural cavity
• It remains a large open pelvic recess in all adults

Q9. Why is the lesser sac closely related to pancreatic disease?

• The pancreatic duct opens directly into the lesser sac
• The pancreas lies immediately posterior to the lesser sac
• The pancreas lies inside the lesser omentum
• The lesser sac is contained within pancreatic tissue

Q10. Which developmental structure gives rise to the peritoneal arrangement that forms the lesser sac behind the stomach?

• Dorsal mesogastrium
• Ventral mesentery of the midgut
• Mesonephric duct
• Urachus