The lesser sac is the peritoneal cavity space located between which organs?

The lesser sac is the peritoneal cavity space located between which organs?

• A. The space between the liver and the stomach
• B. The space behind the pancreas within the retroperitoneum
• C. The peritoneal cavity space located between the liver, pancreas, and stomach
• D. The space around the spleen and tail of the pancreas

Answer: (C)

The lesser sac is a pocket of the peritoneal cavity tucked behind the stomach and in front of the pancreas. Its borders are formed by the stomach (anterior boundary, via the lesser omentum and hepatogastric ligament) and the pancreas (posterior boundary), with the liver contributing to the superior boundary. So the space is effectively bordered by the liver, pancreas, and stomach. It connects to the larger peritoneal cavity (greater sac) through the epiploic foramen. On ultrasound, you’d look for fluid or structures posterior to the stomach and anterior to the pancreas, with the liver forming the upper boundary helping identify it. The other descriptions describe different spaces (between liver and stomach alone, behind the pancreas in the retroperitoneum, or around the spleen and tail of the pancreas), which don’t define the lesser sac.

The lesser sac is a pocket of the peritoneal cavity tucked behind the stomach and in front of the pancreas. Its borders are formed by the stomach (anterior boundary, via the lesser omentum and hepatogastric ligament) and the pancreas (posterior boundary), with the liver contributing to the superior boundary. So the space is effectively bordered by the liver, pancreas, and stomach. It connects to the larger peritoneal cavity (greater sac) through the epiploic foramen. On ultrasound, you’d look for fluid or structures posterior to the stomach and anterior to the pancreas, with the liver forming the upper boundary helping identify it. The other descriptions describe different spaces (between liver and stomach alone, behind the pancreas in the retroperitoneum, or around the spleen and tail of the pancreas), which don’t define the lesser sac.