Clinical outcomes of ampullary neoplasms in resected margin positive or uncertain cases after endoscopic papillectomy

Table 2 The characteristics of all patients

Number of all EP cases	45
Male/female	29/16
Age (yr, mean ± SD)	65.0 ± 11.5
Tumor size (mm, mean ± SD)	21.1 ± 6.2
En-bloc resection/piecemeal resection	41/4
Stent placement
Both/pancreatic/biliary/none	33/7/4/1
Complications of EP
Post-EP bleeding	9 (20.0%)
Post-EP pancreatitis	13 (28.9%)
Hospital stay (d, mean ± SD)	15.4 ± 8.5
Pathological diagnosis
Adenoma/adenocarcinoma	33/12
Pathological evaluation of resected margin
Positive/uncertain/negative	12/12/21
Horizontal margin
Positive/uncertain	9/10
Vertical margin
Positive/uncertain	5/9
Median observation period (mo, range)	27.1 (3.0-133.4)

EP: Endoscopic papillectomy.