Psychological, Psychophysical and Epigenetic Determinants of Chronic Pain After Cytoreductive - Hyperthermic Intraoperative Chemotherapy

PRIMARY OBJECTIVE: I. To evaluate the association of preoperative psychological risk factors (depression, anxiety or catastrophizing) with the development of chronic postsurgical pain after cytoreductive surgery with intraoperative hyperthermic chemotherapy (CRS-HIPEC). SECONDARY OBJECTIVES: I. To evaluate the association of preoperative psychological risk factors (depression, anxiety or catastrophizing) with the development of persistent postsurgical pain after CRS-HIPEC. II. To evaluate the association between preoperative abnormal sensory disturbances and chronic postsurgical pain after CRS-HIPEC. III. To assess the association of blood micro ribonucleic acids (RNAs) signatures with the development of chronic postsurgical pain after CRS-HIPEC. IV. To determine the rate of and factors associated with persistent and chronic opioid use after CRS-HIPEC. V. To determine the rate of persistent and chronic postsurgical anxiety and depression. VI. To investigate changes in psychological risk factors (depression, anxiety or catastrophizing) and sensory disturbances after CRS-HIPEC overtime. EXPLORATORY OBJECTIVE: I. To explore the impact of perioperative (in-patient) opioid use, non-opioid analgesic use and anesthetics on the development of persistent and chronic opioid use after CRS-HIPEC. OUTLINE: Patients complete questionnaires over 15 minutes and undergo pain assessments prior to surgery and at 3, 6 and 12 months after surgery. Patients also undergo blood sample collection before surgery and optionally at 3, 6 and 12 months after surgery.