Intermediate Mesocolon Quiz

Q1. Where does the root of the transverse mesocolon attach in relation to the pancreas?

• Inside the pancreatic duct
• Along the pancreatic region, including the head and inferior border of the body
• Along the posterior surface of the left kidney only
• Along the superior border of the spleen only

Q2. Which part of the duodenum is crossed or overlain by the transverse mesocolon root?

• Fourth part only
• First part only
• Duodenojejunal flexure only
• Second part of the duodenum

Q3. Which vessels pass through the transverse mesocolon toward the transverse colon?

• Middle colic vessels
• Renal vessels
• Inferior epigastric vessels
• Splenic vessels

Q4. Which vascular territory primarily supplies the proximal two-thirds of the transverse colon?

• Superior mesenteric artery territory
• Inferior mesenteric artery territory exclusively
• Celiac trunk territory exclusively
• Internal iliac artery territory

Q5. Which vascular territory primarily supplies the sigmoid colon?

• Inferior mesenteric artery territory
• Celiac trunk territory
• External iliac artery territory
• Superior mesenteric artery territory only

Q6. Which important retroperitoneal structure lies near the apex of the inverted V-shaped root of the sigmoid mesocolon?

• Splenic artery
• Portal vein
• Inferior vena cava at the hepatic level
• Left common iliac vessels

Q7. Which urinary structure is closely related to the lateral limb of the sigmoid mesocolon root?

• Left ureter
• Renal pelvis within the kidney
• Right ureter only
• Urethra

Q8. Why are the transverse and sigmoid colon more mobile than the ascending and descending colon?

• They are suspended by the falciform ligament
• They are fixed directly to the vertebral bodies
• They retain mesenteries that permit intraperitoneal mobility
• They lack peritoneum entirely

Q9. How does lymphatic drainage from the transverse colon generally travel within its mesocolon?

• Directly into the thoracic duct without regional nodes
• Directly into superficial inguinal nodes only
• Through axillary nodes
• Along colic vessels toward regional mesenteric lymph nodes

Q10. Why is the sigmoid mesocolon clinically important during left-sided colorectal surgery?

• It encloses the pancreatic head
• It contains the portal triad
• It contains colonic vessels and overlies the left ureter and iliac vessels
• It forms the anterior boundary of the epiploic foramen