Introduction: Postsurgical gastro-intestinal or intestinal-intestinal anastomotic leaks while not frequent, are the most feared complications for any anastomoses performed in the gastrointestinal tract (GIT) by general surgeons. This is particularly important in the upper GIT, such as gastro-oesophageal anastomosis, where leaks can lead to severe sepsis and septic shock, need for re-operation, or stent placement. For this short review, we will address post-operative leaks following esophagectomy and sleeve gastrectomy as the most frequent bariatric procedure today. The factors and causes responsible for Upper Gastro-Intestinal Anastomosis, as they relate to the patient, surgeon or technique will be reviewed. Moreover, the diagnosis and current management will be examined.

Keywords: Esophago-gastrointestinal leaks, management of leaks, esophagectomy