Objective Gastric cancer is a common digestive system malignant tumor throughout the world,and it had the second highest incidence and mortality rate after lung cancer in 2016.
Objective The pectoralis major myocutaneous flap(PMMF)has been used as the workhorse flap for head and neck defect reconstruction after surgical resection of malignant tumors since its first descripti
Objective The common benign tumors of the liver with an estimated prevalence of 0.4–20%.most hemangiomas are small,they have no hazardous effects and do not interfere with adjacent organs,so treatment