Advanced Lesser Sac Quiz

Q1. Why can a posterior gastric perforation contaminate the lesser sac early?

• The posterior stomach lies within the retroperitoneum
• The lesser sac is inside the gastric wall
• The posterior stomach opens into the portal vein
• The posterior stomach directly borders the lesser sac

Q2. Why can pancreatic fluid collections expand into the lesser sac?

• The lesser sac is part of the pancreatic duct system
• The pancreas is suspended within the greater omentum free edge
• The lesser sac is a potential space immediately anterior to the pancreas
• The pancreas drains physiologically into the lesser sac

Q3. How does the epiploic foramen influence fluid movement involving the lesser sac?

• It provides the normal communication between lesser and greater sacs
• It permanently isolates the lesser sac
• It connects the lesser sac to the pleural cavity
• It drains the lesser sac directly into the inferior vena cava

Q4. Why is division of the gastrocolic ligament useful in pancreatic surgery?

• It divides the portal triad
• It directly opens the pancreatic duct
• It exposes the kidney without entering the peritoneum
• It provides access through the lesser sac to the anterior pancreas

Q5. Which relationship explains why a lesser-sac collection can displace the stomach anteriorly?

• The lesser sac is posterior to the stomach
• The lesser sac lies inside the stomach
• The lesser sac lies entirely below the pelvis
• The stomach is fixed behind the pancreas

Q6. How does stomach rotation contribute to formation of the lesser sac?

• Rotation fuses the stomach directly to the kidneys
• Rotation creates the pleural cavities
• Rotation creates a peritoneal recess behind the stomach within the dorsal mesogastric region
• Rotation places the stomach entirely retroperitoneally

Q7. Why can internal herniation through the epiploic foramen place bowel within the lesser sac?

• The bowel enters through the pancreatic duct
• The greater omentum forms an open pelvic canal into the sac
• The lesser sac normally contains the jejunum
• Mobile bowel can pass through the natural opening into the lesser sac

Q8. Why is the posterior wall of the lesser sac surgically sensitive?

• The urinary bladder forms its entire posterior wall
• Only subcutaneous fat lies posteriorly
• Important pancreatic, vascular, renal, and diaphragmatic structures lie behind it
• The posterior wall contains no major structures

Q9. What is the significance of the superior recess of the lesser sac?

• It extends through the inguinal canal
• It extends superiorly behind the liver toward the caudate lobe and diaphragm
• It descends into the rectovesical pouch
• It lies inside the gallbladder

Q10. Which statement best integrates the anatomy of the lesser sac?

• It is a posterior gastric peritoneal recess with developmental, pancreatic, vascular, and surgical relationships
• It is a retroperitoneal renal compartment with no communication to the peritoneal cavity
• It is a pleural recess created by diaphragm development
• It is the main peritoneal compartment extending throughout the pelvis