Intermediate Lesser Sac Quiz

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

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

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

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

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

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

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

• Third part of the duodenum
• Jejunum
• Transverse colon
• 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
• Inferior epigastric artery
• Splenic artery
• External iliac artery

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

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

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

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

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

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

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

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

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