Table 3 The differential diagnosis of mucinous cystic neoplasms and intraductal papillary mucinous neoplasms

Age

50

68

Gender

Females (>95%)

Males∼Females

Specific endoscopic finding

None

Mucin extrusion from ampulla

Specific radiologic finding

Multilocular thick-walled cyst (‘CYST IN CYST’)

Cystically dilated ducts (‘CYST BY CYST’)

Location

Tail (>90%)

Head (>80%)

Gross ductal communication

No

Yes

Specific histologic findings

Ovarian Stroma (almost a requirement)

Cystically dilated native ducts with villous nodules