<prompt> Communicating opening between greater sac and lesser sac-Foramen of winslowForamen of MonroHepatorenal pouchPouch of Douglas  <response>: Ans. is a i.e., Foramen of winslow o Epiploic foramen foramen of winslow or aditus to lesser sac is a slit-like opening through which lesser sac communicates w ith greater sac. It is situated at the level of T12 vertebra. Its boundries areAnterior :- Right free margin of lesser omentum contains portal vein, hepatic artery proper and bile duct.Posterior :- IVC, right suprarenal gland and T12 vertebra.Superior :- Caudate lobe of liver.Inferior :- 1st part of duodenum and horizontal part of hepatic artery. 