Cisterna Chyli Flashcards

Explore the cisterna chyli, its retroperitoneal location, lymphatic tributaries, formation, thoracic duct connection, and clinical anatomy.

Card 1 of 20Question

What is the cisterna chyli?

A variably present dilated lymphatic sac that forms the lower end of the thoracic duct.

In This Section

1. What is the cisterna chyli?

A variably present dilated lymphatic sac that forms the lower end of the thoracic duct.

2. In which anatomical cavity is the cisterna chyli located?

The abdominal cavity, within the retroperitoneum.

3. At approximately which vertebral levels is the cisterna chyli commonly located?

Anterior to the L1 and L2 vertebral bodies.

4. What is the typical position of the cisterna chyli relative to the abdominal aorta?

Posterior and slightly to the right of the abdominal aorta.

5. Which major vein lies near the right side of the cisterna chyli?

The inferior vena cava.

6. Which part of the diaphragm is closely related to the cisterna chyli?

The right crus of the diaphragm.

7. Which major lymphatic vessel continues superiorly from the cisterna chyli?

The thoracic duct.

8. Through which diaphragmatic opening does the thoracic duct typically enter the thorax?

The aortic hiatus at approximately T12.

9. Which major lymphatic trunks commonly contribute to the formation of the cisterna chyli?

The right and left lumbar lymphatic trunks and the intestinal lymphatic trunk.

10. What regions drain lymph into the cisterna chyli through the lumbar lymphatic trunks?

The lower limbs, pelvis, and parts of the posterior abdominal wall and abdominal organs.

11. What is the principal source of lymph carried by the intestinal lymphatic trunk?

The gastrointestinal tract and its associated digestive organs.

12. What is chyle?

Lipid-rich intestinal lymph that appears milky after absorption of dietary fats.

13. Which intestinal lymphatic structures initially absorb most dietary long-chain fats?

The lacteals within the intestinal villi.

14. What is the principal function of the cisterna chyli?

To collect lymph from abdominal and lower body lymphatic trunks and convey it into the thoracic duct.

15. Where does lymph collected by the cisterna chyli eventually enter the venous circulation?

At the left venous angle, near the junction of the left internal jugular and subclavian veins.

16. Is the cisterna chyli present as a distinct dilated sac in every individual?

No. It may be small, absent as a distinct sac, or replaced by a network of lymphatic channels.

17. What anatomical variation can occur in the shape of the cisterna chyli?

It may be elongated, fusiform, saccular, or irregularly dilated.

18. What is a potential consequence of injury to the cisterna chyli during retroperitoneal surgery?

Chylous lymph leakage, potentially causing chylous ascites.

19. What is chylous ascites?

Accumulation of triglyceride-rich lymphatic fluid within the peritoneal cavity.

20. Which noninvasive imaging technique can help visualize the cisterna chyli and central lymphatic channels?

Magnetic resonance lymphangiography.