Role of abdominal ultrasound for the surveillance follow-up of pancreatic cystic neoplasms: a cost-effective safe alternative to the routine use of magnetic resonance imaging

Table 1 Patient characteristics

Characteristics
Number of patients	200
Baseline total PCN	261
Multiple PNC patients, n (%)	51 (25)
Sex ratio, M:F	62:138
Age in yr, mean ± SD	67 ± 14
Main duct diameter in mm, median (range)	2.6 (1.8-4.0)
Cystic size in mm, mean ± SD	16 ± 13
PNC < 10 mm, n (%)	97 (37)
Location, uncinate process, n (%)	73 (28)
Location, pancreatic head, n (%)	106 (40)
Location, pancreatic body, n (%)	54 (21)
Location, pancreatic tail, n (%)	28 (11)
Radiologically suspected IPMN, n (%)	148 (74)
Mean follow-up, mo (± SD)	25.1 (± 18.2)
Surgery during follow-up, n (%)	2 (1)

PNC: Pancreatic cystic neoplasm; IPMN: Intraductal papillary mucinous neoplasm.