Prognostic Factors of Peritoneal Metastases from Colorectal Cancer following Cytoreductive Surgery and Perioperative Chemotherapy

Table 2

Operation methods.

Completeness of cytoreduction (CCR)
CCR-0 (complete cytoreduction)	108
CCR-1 (incomplete cytoreduction)	34
CCR-0 resection ratio and PCI levels^#
PCI ≤ 10	71/75 (94.7%)	𝑃=0.015
11 ≤ PCI ≤ 20	23/31 (74.2%)
21 ≤ PCI ≤ 30	14/26 (53.8%)
31 ≤ PCI ≤ 39	0/10 (0%)
CCR-0 resection ratio and SB-PCI levels^#
SB-PCI ≤ 2	86/94 (91.5%)	𝑃<0.001
SB-PCI ≥ 3	22/48 (45.8%)
CCR-0 resection ratio and histologic type
Differentiated type	97/119 (81.5%)	𝑃=0.015
Poorly differentiated	11/23 (43.4%)
Removed peritoneal zones and organs
Left diaphragmatic peritoneum	60
Right diaphragmatic peritoneum	61
Pelvic peritoneum	99
Splenectomy	131
Gastrectomy
Distal gastrectomy	8
Wedge resection	4
Cholecystectomy	140
Small bowel resection	83
Large bowel resection
Ileocaecal resection	2
Total colectomy	7
Right hemicolectomy	21
Left hemicolectomy	8
Sigmoidectomy	1
Rectosigmoidectomy	28
Resection of anastomosis	36
Amputation of rectum	4
Bleeding volume (mean ± SE)	1635 ± 1234 mL
Operation time (mean ± SE)	239 ± 103 min.
No. of resected peritoneal zones	5.1 ± 3.2 (1–13)
No. of resected organs	3.8 ± 2.0 (0–8)
HIPEC
Not done	55
done	87

^#SB-PCI: peritoneal cancer index on the small bowel.