Morpho-functional analysis of patient-derived xenografts reveals differential impact of gastric cancer and chemotherapy on the tumor ecosystem, affecting immune check point, metabolism, and sarcopenia ↗ ↖ A. Venkatasamy E. Guerin W. Reichardt V. Devignot M P Chenard L. Miguet B. Romain A C Jung I. Gross C. Gaiddon G. Mellitzer