Table 2. Characteristics of three patients who switched to surgery due to uncontrollable perforation.

Age (years)/sex	Duodenal location	Size (mm)	Macroscopic type	Final diagnosis	Depth	Lymphovascular invasion	Hospitalization (d)	Prognosis (mo)
62 /F	Second, outer curve	23	II a	High-grade adenoma	M	Negative	14	DFS 51.3
63 /M	Third posterior	27	II a	Adenocarcinoma	M	Negative	17	DFS 13.4
64 /F	Second, outer curve	36	II a	Adenocarcinoma	M	Negative	25	DFS 83.3

Abbreviations: DFS, disease-free survival; M, intramucosal invasion.