Figure 1
A 79-year-old woman with pancreatic ductal adenocarcinoma. (A) Axial pancreatic phase CT image shows lower attenuating mass (arrow) compared with the pancreas parenchyma (arrowhead) in the pancreatic head, which encases the first jejunal branch of the superior mesenteric artery (open arrow). (B) Magnetic resonance cholangiopancreatography (MRCP) image shows dilatation of the bile and pancreatic ducts, the so-called double duct sign (open arrowheads). Note the abrupt narrowing of both bile and pancreatic ducts.
Figure 2
A 60-year-old woman with pancreatic ductal adenocarcinoma. (A) Axial T2-weighted image shows a hyperintense mass (arrow) in the pancreatic body with upstream dilatation of the pancreatic duct. (B, C) Axial gadoxetic acid-enhanced arterial and portal venous phase MR images show a hypovascular mass (arrow) that invades the splenic artery (open arrow) and vein (arrowhead). (D) Axial portal venous phase MR image shows hypovascular metastatic lesions (curved arrows) in the liver.
Figure 3
A 60-year-old man with a high-grade neuroendocrine tumor. (A, B) Axial gadoxetic acid-enhanced arterial phase MR images show an irregular mass (arrow) in the uncinate process of the pancreas. There are hypervascular masses (open arrows) in the right hepatic lobe. (C) Axial portal venous phase MR image shows tumor thrombosis (arrowhead) in a branch of the superior mesenteric vein. (D) Axial T2-weighted image shows a hyperintense mass (open arrow) in the right hepatic lobe. There is no dilatation of the pancreatic duct.
Figure 4
A 31-year-old man with a small solid pseudopapillary tumor. (A) Axial T1-weighted fat-suppressed MR image shows a 3-cm solid mass (arrow) with a well-defined margin in the pancreatic head. (B) On axial T2-weighted fat-suppressed MR image, the mass (arrow) shows relatively homogeneous high signal intensity. (C, D) Axial diffusion-weighted image (b = 800 s/mm2) and apparent diffusion coefficient map show the mass (arrow) with diffusion restriction. (E, F) Axial gadolinium-enhanced arterial and 3-minute delayed phase MR images show early heterogeneous and progressive enhancement of the mass (arrow).
Figure 5
A 67-year-old man with prostate cancer. (A) Axial pancreatic phase CT image shows a low attenuating mass (arrow) encasing the splenic artery in the pancreatic body. (B) Axial T2-weighted image shows hyperintense mass (arrow) and normal pancreatic duct (arrowhead) without upstream dilatation.
Figure 6
A 67-year-old woman with focal type autoimmune pancreatitis. (A) Axial pancreatic phase CT image shows a low attenuating mass (arrow) in the pancreatic head. Note the relatively high attenuation of the normal pancreatic parenchyma (open arrow). (B) On axial portal venous phase CT image, the mass (arrow) shows delayed enhancement and similar attenuation to the normal pancreas parenchyma (open arrow). (C) MRCP image shows dilatation of the bile and pancreatic ducts with smooth tapered narrowing (arrowhead and open arrowhead). (D) On axial portal venous phase CT image obtained after 50 days, the pancreatic lesion has resolved.
Figure 7
A 23-year-old man with focal type autoimmune pancreatitis. (A) Axial pancreatic phase CT image shows a low attenuating lesion (arrow) in the pancreatic body. Note no pancreatic duct dilatation in the tail portion. (B) Axial pancreatic phase CT image obtained after 3 months shows the disappearance of the mass. (C, D) On follow-up CT image obtained after seven months, newly developed low attenuating lesions (arrowheads) are noted in the uncinate process of the pancreas and the left kidney.
Figure 8
A 49-year-old man with groove pancreatitis who had a history of alcohol consumption greater than 50 g/day for more than 20 years. (A) Axial T1-weighted image shows a hypointense lesion (arrows) in the pancreaticoduodenal groove. There is an oval low signal intensity lesion (arrowhead) in the duodenal wall, suggesting a cyst. (B, C) Axial gadolinium-enhanced arterial and 3-minute delayed phase MR images show delayed enhancement of the mass-like lesion (arrows). (D) MRCP image shows dilatation of the bile and pancreatic ducts with smooth tapered narrowing (open arrow and open arrowhead). Note multiple cystic lesions (arrowheads) around the pancreaticoduodenal groove.
| AIP | Autoimmune pancreatitis |
| CT | Computed tomography |
| MR | Magnetic resonance |
| MRCP | Magnetic resonance cholangiopancreatography |
| NET | Neuroendocrine tumor |
| PDAC | Pancreas ductal adenocarcinoma |
| SPT | Solid pseudopapillary tumor |