The lesser sac may be conceptualized as the space posterior to the lesser omentum, between the posterior wall of the stomach and surface of peritoneum that covers the anterior surface of the left kidney 1. The epiploic foramen (of Winslow) is the only natural communication between greater and lesser sac.
What is lesser sac and greater sac?
Anatomical terminology
The lesser sac, also known as the omental bursa, is the cavity in the abdomen that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the omental foramen or Foramen of Winslow.
What is the lesser sac function?
The omental bursa, also called the lesser sac, is located posteriorly to the stomach and the lesser omentum (which will be discussed later), and anteriorly to the pancreas and duodenum. The function of the omental bursa is to allow unrestricted movement of the stomach.
