Regional Therapies Utilized in Treating Unresectable Colorectal Adenocarcinoma with Peritoneal Metastases

Colorectal peritoneal metastases portend a poor prognosis when compared to other isolated sites of metastatic disease. The advent of regional therapies, including cytoreductive surgery, have improved outcomes for patients with peritoneal carcinomatosis. However, these options are typically only available in patients deemed to have resectable disease. For patients with unresectable peritoneal disease, non-surgical regional therapy has only been studied in early-phase clinical trials. This represents a gap in therapy in a population with a desperate need. In this review, we highlight the current limited data, as well as postulate on the future direction of regional therapies in patients with unresectable peritoneal metastases from colorectal adenocarcinoma.