The features of peritoneal metastases from gastric cancer
Gianni Mura , Beatrice Verdelli
Journal of Cancer Metastasis and Treatment ›› 2016, Vol. 2 : 365 -74.
The features of peritoneal metastases from gastric cancer
Peritoneal Carcinomatosis (PC) from metastasization of Gastric Cancer (GC), either present at first diagnosis of GC or as recurrence, is considered a fatal disease with no hope of definitive cure. Although newer agents like S1 and docetaxel have shown some promise, the median overall survival with the current first line chemotherapy is only 8 to 14 months, and is not greatly improved by adding targeted therapy. A multi-modal approach with cytoreductive surgery (CRS) associated with hyperthermic intraperitoneal chemotherapy (HIPEC) has been developed along the last two decades in order to tackle this problem. It’s an aggressive, combined treatment still under investigation. Studies coming from Europe and Far East reported long-term survival with 5-year survival rates up to nearly 25% in case of complete cytoreduction. Prophylactic/adjuvant setting is the most evidence-based indication for HIPEC in advanced-stage GC patients without PC, in order to prevent peritoneal recurrence and to improve overall survival. The rationale for immuno treatment in patients with gastric PC is strong. A randomized phase II study, combining complete CRS with intraperitoneal catumaxomab is on-going. The detection of free peritoneal cancer cells is the more realistic and practical way for the identification of patients at risk of carcinomatosis after surgery. The routine use of techniques of molecular detection in peritoneal washing appears to be the more sensitive method. Such patients are potential candidate for multimodal and locoregional treatments in order to prevent the peritoneal recurrence.
Gastric cancer / peritoneal carcinomatosis / hyperthermic intraperitoneal chemotherapy / immunotherapy / reverse transcription-polymerase chain reaction
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