The cholangiopancreatographic findings in 22 patients with pseudotumor
ous pancreatitis (PTP) were evaluated on the basis of endoscopic retro
grade cholangiopancreatography (ERCP) and percutaneous transhepatic ch
olangiography (PTC), All patients were found with a focal mass in the
pancreas based on the findings of ultrasound and / or CT. However, onl
y one patient had been diagnosed correctly as suffering from chronic p
ancreatitis by ERCP, Normal pancreatic duct was found in 4 patients, T
here were five patients having abnormal pancreatic ducts, but findings
of ERCP could not provide definite diagnosis, In the remaining 12 pat
ients the abnormalities of pancreatic and / or bile ducts were strikin
gly similar to those found in pancreatic carcinoma, Double duct sign w
as also seen in one patient, All these 12 patients mere incorrectly di
agnosed as having pancreatic carcinoma, It is concluded that ERCP I PT
C has little value in detecting PTP.