Surgical management of stage IV gastric adenocarcinoma: A systematic review and expert recommendations from the Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD) and the Spanish Association of Surgeons (AEC).

This manuscript presents a systematic review and expert consensus from oncology and surgery on the management of metastatic gastric cancer. A literature search was conducted in PubMed and Google Scholar, selecting 28 relevant studies (21 clinical trials and 7 systematic reviews), along with international guidelines. The objective was to assess the role of surgery and locoregional therapies in patients with peritoneal, hepatic, pulmonary, or nodal metastases, and to establish multidisciplinary recommendations. Cytoreductive surgery associated to HIPEC may offer benefits in selected patients with limited peritoneal carcinomatosis (Peritoneal Carcinomatosis Index ≤ 6), an absence of distant metastasis, an adequate response to systemic chemotherapy and an ECOG performance status of 0-1. Resection of non-peritoneal metastases may also be considered in specific contexts. Prospective clinical trials are required to confirm these findings and define optimal selection criteria.