709. Metastases to surgical scars from primary operation for intraabdominal malignancies, revisited during secondary cytoreductive surgery for recurrent peritoneal disease

Background: Cytoreductive surgery (CRS) with Hyperthermic Intraperitoneal Chemotherapy (HIPEC) is commonly used for the treatment of peritoneal surface malignancies. Most patients present with metachronous peritoneal metastasis appearing months or even years after resection of the primary tumor. One of the possible recurrence sites is the surgical scar from previous operations. The aim of the present study was to evaluate the presence of malignant tissue in surgical scars resected during CRS and HIPEC.