[What's new in gastric cancer?].

In the locally advanced stage, multimodal therapies such as perioperative chemotherapy with FLOT or neoadjuvant radiochemotherapy are recommended. The integration of immunotherapy into these concepts could improve the prognosis. Phase II/III trials such as DANTE, KEYNOTE-585 and MATTERHORN show promising results in terms of pathological remissions but data on survival time extension for unselected patients are so far sobering. Immunotherapies and new targeted therapies offer hope in the palliative treatment of metastatic gastric cancer. Studies such as CheckMate-649 and KEYNOTE-859 show an improvement in survival and response rates. Currently, both pembrolizumab and nivolumab have been approved for the first-line treatment of tumors with positive PD-L1 expression. In HER2-positive tumors, the KEYNOTE-811 study showed that patients benefit from combination therapies with immune checkpoint inhibition and anti-HER2 therapies. The antibody-drug conjugate trastuzumab-deruxtecan is a promising second-line treatment option for HER2-positive tumors after treatment failure with trastuzumab.In addition, the bispecific antibody zanidatamab shows promising results in first-line treatment. New targeted therapies against CLDN18.2 and FGFR2b are showing promising results. The anti-claudin 18.2 (CLDN18.2) antibody zolbetuximab leads to improved survival compared to chemotherapy alone in patients with CLDN18.2 positive disease in first-line therapy, with approval expected in 2024.