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Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).

Click A 27 year-old male with groove pancreatitis. Abdominal MRI. Transverse (stack 1) and coronal (stack 2) T2-weighted half-Fourier single-shot fast spin-echo (SSTS-SE) images with and without fat-suppression, precontrast in-phase and out-of-phase 2D breath-hold dual echo gradient recalled echo (stack 3, 4), pre-contrast 3D-GRE fat suppressed T1-weighted images in the transverse plane (stack 5) and postcontrast 3D-GRE fat-suppressed T1-weighted sequences in the transverse plane on the arterial (stack 6), portal venous (stack 7) and delayed (stack 8) phases. The T2-weighted images demonstrates slightly hypointense sheet-like mass in the pancreatoduodenal groove, with cystic changes, and mild dilatation of the common bile duct with long and smooth tapering; The T1-weighted images shows an hypointense sheet-like mass bordered by the duodenum and extending into the pancreatic head. On immediate postgadolunium image is observed imperceptible enhancement in the mass located between the duodenum and the pancreatic head. On the portal venous phase is appreciated patchy enhancement, and greater enhancement is demonstrated on the delayed phase. (Parameters - Field strength: 1,5 T; T2 SSTS-SE: TR - 1500, TE - 85; T1 in/out-of-phase: TR - 170, TE - 2.2/4.4; T1 3D-GRE FS: TR - 3.8, TE - 1.7; Contrast: MultiHance, Bracco Diagnostics, Milan, Italy, at 2 ml/s followed by a bolus 20 ml of saline flush).