ArticleJournal of the anus, rectum and colon2020
Investigation of the Japanese Classification of Peritoneal Metastasis from Colorectal Cancer Referring to the Correlation with PCI.
Article in Journal of the anus, rectum and colon, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Article
- Cytoreductive surgery for synchronous and metachronous colorectal peritoneal dissemination: Japanese P classification and peritoneal cancer index.Annals of gastroenterological surgery · 2024Article
- Clinical Outcomes and Prognostic Factors for R0 Resected Colorectal Cancer with Synchronous Peritoneal Metastasis: A Retrospective Study.Journal of the anus, rectum and colon · 2024Article
- A proposed new Japanese classification of synchronous peritoneal metastases from colorectal cancer: A multi-institutional, prospective, observational study conducted by the Japanese Society for Cancer of the Colon and Rectum.Annals of gastroenterological surgery · 2023Article
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Authors and funding
5 authors.
Funding
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Abstract
objectivesIn Japan, there are three grades of peritoneal metastasis from colorectal cancer. The grade depends on the extent and number of lesions (P classification). The P classification is useful for its simplicity but lacks objectivity. On the other hand, the peritoneal cancer index (PCI) objectively indicates the peritoneal metastasis grade. However, the evaluation process is complicated clinically. In this study, we compared these two methods and investigated how to improve the P classification's objectivity by referring to PCI.
methodsWe investigated 150 cases of synchronous peritoneal metastasis from colorectal cancer. We inspected the correlation between the P classification and the PCI and pointed out the problems which prevented objective evaluation when using the P classification. We also estimated new criteria for extent and number in the P classification.
resultsWe found the ideal definition for the best alignment between the P classification and the PCI was: ・P1 is metastases confined to one peritoneal region, ・P2 is 19 or fewer peritoneal metastases in two or more regions, and ・P3 is 20 or more metastases in two or more regions. This revision improved the P classification's objectivity and correlated with the PCI.
conclusionsGrading using the P classification was both imprecise and subjective. We propose a new standard value of extent and number in the P classification based on the PCI. This improvement would provide an objective, simple method of grading for peritoneal metastasis from colorectal cancer.
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