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Staging System of Noura et al for Colorectal Cancer with Synchronous Peritoneal Metastases

Description

Noura et al reported a staging system for patients with colorectal cancer show synchronous peritoneal metastases. This can help to guide patient management. The authors are from Osaka Medical Center for Cancer and Cardiovascular Diseases, Tokyo Medical and Dental University and Tochigi Cancer Center in Japan.


Patient selection: colorectal cancer with synchronous peritoneal metastases

 

Parameters:

(1) peritoneal involvement

(2) hepatic metastasis

 

Peritoneal Involvement

Hepatic Metastasis

Stage

localized to adjacent peritoneum (P1)

negative (H-)

A

limited metastasis to distant peritoneum (P2)

negative (H-)

B

diffuse metastasis to distant peritoneum (P3)

negative (H-)

C

any

positive (H+)

C

 

Metastases limited to the ovaries is designated P2.

 

Additional predictors for worse outcome:

(1) distant metastases (other than liver)

(2) lymph node metastases

(3) Grade 3, mucinous, signet-ring cell or undifferentiated histology

(4) limited lymph node dissection


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