Boundaries of foramen of Winslow are all except
Epiploic foramen, also called the foramen of Winslow, is a passage between the greater (general peritoneal space) and lesser sac (omental bursa) allowing communication between these two spaces. Ref - BDC 6e vol2 240
Caudate lobe of liver
Inferior vena cava
Free border of lesser omentum
4th pa of duodenum
Abdomen and pelvis