To characterize unspecific and incidental CT findings.
A dilated main pancreatic duct (MPD) was described in a CT. A linear endoscopic ultrasound
(EUS) was performed.
At the body and tail, a dilated MPD with intraductal content was observed. At the
head, a filiform MPD was initially seen with an abnormal Santorini duct, raising suspicion
of a MD intraductal papillary mucinous neoplasm (IPMN) in a pancreas divisum. This
was confirmed after observing the “fish mouth” sign at the minor papilla.
EUS allows IPMN diagnosis and characterization. The “fish mouth” sign may only be
present at the minor papilla in pancreas divisum.
