<prompt> Most common site of subphrenic abscess isRight anterior intraperitoneal spaceRight posterior intraperitoneal spaceLeft anterior intraperitoneal spaceLeft posterior intraperitoneal space  <response>: Right posterior intra-peritoneal spaceRight subhepatic spaceRutherford Morisons kidney pouch is bounded in front by the liver gallbladder,above by the liver,behind by the right kidney diaphragm,below by the transverse colon hepatic flexure,to the left by foramen of Winslow duodenum.It is the largest and deepest space of all.It is the most common site of subphrenic abscess.Causes include appendicitis,cholecystitis,post operative,perforated duodenal ulcer,intestinal obstruction. Reference:SRB s manual of surgery,5th edition,page no:575. 