Identify the anatomical structure indicated by the yellow arrow in the image below.

[lightgallery]

Options:
explanation: The image shows a dissection of the abdominal organs, including the liver at the top. The yellow arrow shows the foramen of Winslow, also termed the epiploic foramen. This is a normal anatomical passage through the lesser omentum, representing the connection between the greater sac and the lesser sac of the peritoneal cavity. The epiploic foramen lies in close proximity to the lesser curvature of the stomach. The lesser sac lies posterior to the stomach and lesser omentum. The arrow however, is pointing to a passage rather than an organ.
name: The greater curvature of the stomach
label: e
answer: no
explanation: The image shows a dissection of the abdominal organs, including the liver at the top. The yellow arrow shows the foramen of Winslow, also termed the epiploic foramen. This is a normal anatomical passage through the lesser omentum, representing the connection between the greater sac and the lesser sac of the peritoneal cavity. The arrow is interrupted by the structures which run in the hepatoduodenal ligament (the free edge of the lesser omentum) – including the hepatic artery, the portal vein and the common bile duct.
name: Foramen of Winslow
label: a
answer: yes
explanation: The image shows a dissection of the abdominal organs, including the liver at the top. The yellow arrow shows the foramen of Winslow, also termed the epiploic foramen. This is a normal anatomical passage through the lesser omentum, representing the connection between the greater sac and the lesser sac of the peritoneal cavity. The portal vein is one of the structures contained in the hepatoduodenal ligament, which forms the anterior border of the epiploic foramen. The hepatoduodenal ligament also  contains the hepatic artery and the common bile duct, and which interrupts the yellow arrow in the image.
name: The portal vein
label: d
answer: no
explanation: The image shows a dissection of the abdominal organs, including the liver at the top. The yellow arrow shows the foramen of Winslow, also termed the epiploic foramen. This is a normal anatomical passage through the lesser omentum, representing the connection between the greater sac and the lesser sac of the peritoneal cavity. The gallbladder, while located inferiorly to the liver. The hepatoduodenal ligament, or the free border of the lesser omentum, forms the anterior boundary of the epiploic foramen. This is clinically relevant as the biliary duct, hepatic artery and portal vein travel through this ligament. Therefore, the gallbladder is not located as deep as the yellow arrow indicates.
name: The gallbladder
label: b
answer: no
explanation: The image shows a dissection of the abdominal organs, including the liver at the top. The yellow arrow shows the foramen of Winslow, also termed the epiploic foramen. This is a normal anatomical passage through the lesser omentum, representing the connection between the greater sac and the lesser sac of the peritoneal cavity. The pancreas is located posteriorly to the stomach. However, the arrow is pointing to a passage rather than an organ.
name: The pancreas
label: c
answer: no

Correct answer: a