Chemotherapy in the Context of Esophageal and Gastroesophageal Junction Cancer Cachexia

"During the 2 surgical time, when patient is under general anesthesia, two adipose tissue biopsies of 20cc each (one from abdominal subcutaneous adipose tissue and one from omental adipose tissue) are taken and characterize by oxygraphy (respirometry).~Before the 2 surgical times (before and after chemotherapy) patients will have evaluation of the muscle strength, cachexia (by scan analysis), energy expenditure, anthropometric criteria and biochemical inflammatory."