MedicineClinical SciencesSurgeryGastroenterologyGeneral SurgeryAbdominal SurgeryGastric DiseasesGastric DisordersGastrointestinal PerforationGastrointestinal SurgeryPostoperative Gastrointestinal ComplicationsDuodenal PerforationGastric PathologyGastrointestinal Anastomotic LeakRadical Gastrectomy