Differences in examination results of small anastomotic fistula after radical gastrectomy with afterward treatments: A case report

Table 1 Classification of anastomotic fistula

Basis of classification	Classification	Definition
The time of anastomotic fistula	Early leaks	Early leaks appear 1 to 4 days after surgery
	Intermediate leaks	Intermediate leaks appear 5 to 9 days after surgery
	Late leaks	Late leaks appear 10 or more days after surgery
Clinical relevance and extent of dissemination	Type Ⅰ leaks	TypeⅠleaks are well localized, have no pleural or peritoneal spread, do not induce systemic clinical manifestations, and are usually readily treatable with medication
	Type Ⅱ leaks	Type Ⅱ leak spread to the abdominal cavity or pleura, or the drainage tube, followed by severe systemic clinical manifestations
Clinical and radiological findings	Type A leaks	Type A leaks have no clinical or radiological evidence
	Type B leaks	Type B leaks can be detected by radiological studies but without any clinical finding
	Type C leaks	Type C leaks have both radiological and clinical evidence