GI
Important Gastrointestinal Ligaments
Start with a ligament's endpoints; its vessels, spaces, and operative risks follow from what those endpoints connect.
- Map six gastrointestinal ligaments to their attachments
- Identify vessels and organs contained in each fold
- Use the Pringle maneuver and lesser-sac boundaries clinically
Anatomic relationships
Use the landmarks before naming the lesion
The figure shows the location and nearby structures that distinguish the diagnosis.
Quick check
During surgery for liver trauma, a clamp across the free edge of the lesser omentum stops hepatic inflow.
Which ligament is compressed by the clamp?
Reason it through
- What structures run within the clamped free edge?The portal vein, proper hepatic artery, and common bile duct occupy it.
- Which named maneuver compresses this portal triad?The Pringle maneuver clamps the hepatoduodenal ligament.
Borders of the lesser sac
The omental foramen is the natural passage between greater and lesser sacs.
Anterior to the omental foramen is the hepatoduodenal ligament; the inferior vena cava lies posterior, caudate lobe superior, and first duodenum inferior.
Gastrosplenic and splenorenal ligaments shape the left side of the lesser sac and carry vessels between spleen, stomach, and the kidney region.
Dividing the gastrocolic ligament from the greater curvature provides operative entry into the lesser sac.
Open each route into or around the lesser sac.
Natural communication between greater and lesser sacs.
Anterior border of the foramen and free edge of lesser omentum.
Anterior inferior wall of the lesser sac and common surgical access plane.
Left boundary carrying short gastric, splenic, and pancreatic structures.
Six ligaments, six connections
Name a fold's two endpoints before assigning its contents.
The falciform ligament joins liver to anterior abdominal wall and encloses ligamentum teres hepatis in its free inferior edge.
Together, hepatogastric and hepatoduodenal ligaments form the lesser omentum between liver, stomach, and duodenum.
Gastrosplenic, splenorenal, and gastrocolic ligaments derive from dorsal mesentery and connect stomach, spleen, kidney region, and transverse colon.
Switch among the ligament connections.
Liver to anterior abdominal wall; ligamentum teres and paraumbilical veins.
Liver to duodenum; portal triad; anterior border of omental foramen.
Liver to lesser curvature; gastric vessels; thin lesser omentum.
Greater curvature to transverse colon; major part of greater omentum.
Greater curvature to spleen; short gastric and left gastroepiploic vessels.
Spleen to posterior wall near left kidney; splenic vessels and pancreatic tail.
The name usually tells both endpoints; the exam asks what rides between them.
Ventral versus dorsal mesentery
Embryologic origin predicts membership in the lesser or greater omental family.
Ventral mesentery persists only in the foregut region and produces the falciform ligament and lesser omentum.
The lesser omentum separates into hepatogastric and hepatoduodenal components.
With stomach rotation, dorsal mesogastrium expands to form the greater omentum and splenic ligaments.
Reveal the derivative sequence.
- 1Foregut is suspended by ventral and dorsal mesentery
Only the foregut retains a ventral mesentery.
- 2Liver grows into ventral mesentery
This separates anterior and posterior connections.
- 3Falciform and lesser omentum form
Falciform lies anterior; lesser omentum links liver to stomach and duodenum.
- 4Stomach rotation expands dorsal mesogastrium
The lesser sac and splenic connections develop behind stomach.
- 5Greater omentum and splenic ligaments mature
Gastrocolic, gastrosplenic, and splenorenal folds carry their vessels.
The portal triad and Pringle maneuver
A temporary clamp tests anatomy and blood flow simultaneously.
Within the hepatoduodenal ligament, the portal vein lies posterior, the proper hepatic artery anteromedial, and the common bile duct anterolateral.
Compression reduces hepatic arterial and portal venous inflow; continued bleeding points to a source such as the hepatic veins or inferior vena cava.
Which structure is not inside the hepatoduodenal ligament?
Pringle stops portal and arterial inflow, not hepatic venous outflow.
Lesser versus greater omentum
Development divides these peritoneal folds into ventral and dorsal families.
Falciform, hepatogastric, and hepatoduodenal structures arise from ventral mesentery, although the falciform ligament is not part of the lesser omentum.
Gastrocolic, gastrosplenic, and splenorenal ligaments arise from dorsal mesogastrium within the greater-omentum and splenic-ligament family.
Classify each structure by mesenteric origin.
Hepatoduodenal ligament
Gastrosplenic ligament
Splenorenal ligament
Liver-facing folds are ventral; spleen and greater-curvature folds are dorsal.
What each ligament carries
A vessel injury can be localized by the ligament being divided.
Short gastric and left gastroepiploic vessels cross the gastrosplenic ligament between stomach and spleen.
Splenic artery, splenic vein, and pancreatic tail pass within the splenorenal ligament near the splenic hilum.
The gastrocolic part of the greater omentum contains gastroepiploic vessels along the greater curvature and separates stomach from transverse colon.
Open the contained structures.
Ligamentum teres hepatis and paraumbilical veins.Portal vein, proper hepatic artery, and common bile duct.Gastric vessels along the lesser curvature.Short gastric and left gastroepiploic vessels.Splenic vessels and pancreatic tail.Gastroepiploic vessels and access to the lesser sac.
Stage 1 of 3: Overview
Overview
Important Gastrointestinal Ligaments
Embryologic origin predicts membership in the lesser or greater omental family.
Localization check
Which landmark matters most?
Choose the location that rules the other answer choices in or out.
Which ligament is compressed by the clamp?
- Key finding. free edge of the lesser omentum
- Answer. Hepatoduodenal ligament
- Why. The hepatoduodenal ligament contains the portal triad and is compressed in the Pringle maneuver.
- Board rule. The hepatoduodenal ligament carries the portal triad; clamping it tests hepatic inflow.
Use attachments in the operating room
Five operative and developmental views test a splenic vessel, hepatic outflow, lesser-sac entry, the omental foramen, and ventral mesentery.
Cross out wrong locations and highlight the decisive landmark. Each case connects anatomy to its clinical consequence.
During splenectomy, bleeding begins while the surgeon divides the ligament connecting the spleen to the greater curvature of the stomach.
Which vessel is most likely torn?
Reason it through
- Which peritoneal fold is being divided?The gastrosplenic ligament connects spleen with the greater curvature.
- What vessel crosses that fold to the fundus?Short gastric vessels travel within the gastrosplenic ligament.
- Why is the splenic artery not the best fit?The splenic artery reaches the hilum through the splenorenal ligament rather than this stomach-spleen fold.
ligament connecting the spleen to the greater curvatureWhat vessel crosses that fold to the fundus?
- Which peritoneal fold is being divided?The gastrosplenic ligament connects spleen with the greater curvature.
- What vessel crosses that fold to the fundus?Short gastric vessels travel within the gastrosplenic ligament.
- Why is the splenic artery not the best fit?The splenic artery reaches the hilum through the splenorenal ligament rather than this stomach-spleen fold.
A deep liver laceration continues to bleed briskly after the hepatoduodenal ligament is clamped.
Which source best explains the persistent hemorrhage?
Reason it through
- What blood flow did the clamp interrupt?Compression stopped portal venous and hepatic arterial inflow in the portal triad.
- Which major hepatic vessels remain outside that clamp?Hepatic veins and the inferior vena cava are not compressed by the maneuver.
- What does continued bleeding therefore indicate?Persistent hemorrhage favors hepatic venous outflow injury rather than an inflow branch.
continues to bleed briskly after the hepatoduodenal ligament is clampedWhich major hepatic vessels remain outside that clamp?
- What blood flow did the clamp interrupt?Compression stopped portal venous and hepatic arterial inflow in the portal triad.
- Which major hepatic vessels remain outside that clamp?Hepatic veins and the inferior vena cava are not compressed by the maneuver.
- What does continued bleeding therefore indicate?Persistent hemorrhage favors hepatic venous outflow injury rather than an inflow branch.
To expose the posterior wall of the stomach, a surgeon divides the ligament between the greater curvature and transverse colon.
Which peritoneal space is entered?
Reason it through
- Which ligament connects these two structures?The gastrocolic ligament links greater curvature with transverse colon.
- What cavity lies behind the stomach?Dividing that fold opens the lesser sac.
- Why is the greater sac not the operative target?The approach is specifically creating access posterior to the stomach.
between the greater curvature and transverse colonWhat cavity lies behind the stomach?
- Which ligament connects these two structures?The gastrocolic ligament links greater curvature with transverse colon.
- What cavity lies behind the stomach?Dividing that fold opens the lesser sac.
- Why is the greater sac not the operative target?The approach is specifically creating access posterior to the stomach.
A surgeon passes a finger behind the free edge of the lesser omentum through the natural opening that connects the greater and lesser sacs.
Which opening is being used?
Reason it through
- What structure forms the anterior boundary?The hepatoduodenal ligament lies in front of the opening.
- Which two peritoneal compartments communicate here?The greater sac communicates directly with the lesser sac.
- What named passage has those boundaries?This natural doorway is the omental foramen.
connects the greater and lesser sacsWhich two peritoneal compartments communicate here?
- What structure forms the anterior boundary?The hepatoduodenal ligament lies in front of the opening.
- Which two peritoneal compartments communicate here?The greater sac communicates directly with the lesser sac.
- What named passage has those boundaries?This natural doorway is the omental foramen.
In an embryologic model, the liver expands into the ventral mesentery between the foregut and anterior abdominal wall.
Which paired peritoneal structures form from this mesentery?
Reason it through
- Where does ventral mesentery persist?It remains in the foregut region around the developing liver.
- What anterior fold does it produce?The falciform ligament connects liver with the anterior abdominal wall.
- What posterior connection develops at the same time?The lesser omentum links liver to stomach and duodenum.
liver expands into the ventral mesenteryWhat anterior fold does it produce?
- Where does ventral mesentery persist?It remains in the foregut region around the developing liver.
- What anterior fold does it produce?The falciform ligament connects liver with the anterior abdominal wall.
- What posterior connection develops at the same time?The lesser omentum links liver to stomach and duodenum.
Rapid review
Three questions to check
Which ligament is compressed by the clamp?
Hepatoduodenal ligament. The hepatoduodenal ligament contains the portal triad and is compressed in the Pringle maneuver.
Which peritoneal fold is being divided?
The gastrosplenic ligament connects spleen with the greater curvature.
What vessel crosses that fold to the fundus?
Short gastric vessels travel within the gastrosplenic ligament.
Medically reviewed
Fatima Ali, DO
PGY-1 Resident Physician in Psychiatry
University Hospitals, Columbia
DO from Kansas City University
Resident physician and founding medical reviewer at Bone Wizardry, focused on clinical accuracy, clear diagnostic reasoning, and practical board-oriented teaching across the curriculum.
Languages: English, Urdu
Primary reviewerFull physician profile
Medically reviewed
Sources
- Anatomy, Abdomen and Pelvis, Peritoneum2026
- Anatomy, Abdomen and Pelvis: Abdomen2026
- Anatomy, Abdomen and Pelvis: Liver2026
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