Boundaries of foramen of Winslow are all except
Caudate lobe of liver
Inferior vena cava
Free border of lesser omentum
4th pa of duodenum
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
Abdomen and pelvis