Imaging pitfalls of pancreatic serous cystic neoplasm and its potential mimickers

Table 1 Cyst wall enhancement and wall thickness n (%)

	No wallenhancement	Wall thickness< 2 mm	Wall thickness≥2 mm
SCNb	7 (87.5)	1 (12.5)	0
MCNb	0	8 (34.8)	15 (65.2)
IPMN	3 (42.9)	3 (42.9)	1 (14.3)

SCN: Serous cystic neoplasm; MCN: Mucinous cystic neoplasm; IPMN: Intraductal papillary mucinous neoplasm. Typically, macrocysts in SCN show no wall enhancement and MCNs show wall enhancement. IPMN may or may not show wall enhancement. There is a significant difference between SCN and MCN (^bP < 0.01, Kruskal-Wallis test), although no significant difference is shown between SCN and IPMN. The presence or absence of wall enhancement is helpful for differentiating SCN vs MCN, but it is not for SCN vs IPMN. In addition, MCN may present as a relatively thin-walled cyst (< 2 mm).