Whether the stomach is getting bigger and bigger is cancer or not needs to rely on relevant clinical examination to be finally determined.1. For patients with advanced stage of liver malignant tumor, due to the inability to consume enough energy, liver cells are destroyed seriously, resulting in obvious decrease in the ability of secretion of albumin, which will cause a large amount of ascites in the abdominal cavity. Patients may show obvious swelling of the stomach, which is indeed the increasing size of the stomach caused by liver cancer.2. For obese patients, if they do not have enough exercise, too much fat will be accumulated in the abdomen as abdominal distension. In this case, if perfect gastroenteroscopy, head, chest and abdominal CT do not find any tumor lesion, it can be thought that the belly swelling is caused by obesity.3. For patients with decompensated cirrhosis, there will be a large amount of peritoneal effusion, but the patients can not have the occurrence of liver malignant tumors, so this is not a tummy enlargement caused by cancer either.