Table 4.

Anatomic structures involved in the 13 abdominopelvic regions of the peritoneal cancer index (PCI).

Regions	Anatomic structures
0 Central	Midline abdominal incision – entire greater omentum – transverse colon
1 Right upper	Superior surface of the right lobe of the liver – undersurface of the right hemidiaphragm – right retro hepatic space
2 Epigastrium	Epigastric fat pad – left lobe of the liver – lesser omentum – falciform ligament
3 Left upper	Undersurface of the left hemidiaphragm – spleen – tail of pancreas – anterior and posterior surfaces of the stomach
4 Left flank	Descending colon – left abdominal gutter
5 Left lower	Pelvic sidewall lateral to the sigmoid colon – sigmoid colon
6 Pelvis	Female internal genitalia with ovaries, tubes and uterus – bladder, Douglas pouch – rectosigmoid colon
7 Right lower	Right pelvic sidewall – cecum – appendix
8 Right flank	Right abdominal gutter – ascending colon
9 Upper jejunum
10 Lower jejunum
11 Upper ileum
12 Lower ileum