Abdominal ultrasound demonstrated mild intra and extra hepatic biliary dilatation. CBD: 1cm. MRCP demonstrated no ductal dil but pancr enlargement?

Pancreatitis. Mild ductal dilatation with a 1 cm. CD is mild. That there is pancreatic enlargement suggest probable inflammation. This would impinge on the CD as it passes to ampulla of duodenum. Farthest site ie mild duct enlargement fits picture. To R.O tumor a transduodenal ultrasound of pancreatic head would show a hidden lesion. Otherwise if needed, a PET/CAT could help.