RecruitingDevice studyA Feasibility Study of Mass-Based Response Drug Screening to Guide Personalized Hyperthermic Intraperitoneal Chemotherapy for High-Grade Appendiceal and Colorectal Adenocarcinoma With Peritoneal MetastasisThis study will evaluate the role of mass-based response testing (MRT) to select and deliver personalized hyperthermic intraperitoneal chemotherapy (HIPEC) regimens to patients with peritoneal metastasis (PM) from high-grade appendiceal adenocarcinomas (HGAA) and colorectal cancer (CRC).