Peritoneum is one of the common site of colorectal cancer metastasis. Traditionally

peritoneal carcinomatosis is associated with a poor prognosis without effective surgical treatment. Recently

the attitude towards the treatment strategies for colorectal peritoneal metastasis has changed significantly with advances in surgical techniques

hyperthermic intraperitoneal chemotherapy and multi-disciplinary treatment. As to the prognosis

colorectal peritoneal metastasis has an inferior outcome to non-peritoneal metastasis under the palliative systemic treatment. However

the complete peritoneal cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy can achieve a long-term survival in selective patients with colorectal peritoneal metastasas. The prognostic factors include peritoneal carcinomatosis index

completeness of cytoreduction

the presence of extra-peritoneal metastasis (liver etc)

peritoneal surface disease severity score and Japanese peritoneal staging. In terms of the treatment

complete peritoneal cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy and systemic treatment (including chemotherapy and targeted therapy) may be the best modality of multi-disciplinary treatment for colorectal peritoneal metastasis.