Granular cell tumor of the pancreas: A case report and review of literature

Figure 1 EUS image of pancreatic GCT. The tumor showed a homogeneous pattern and regular borders (arrow). EUS: Endoscopic ultrasonography; GCT: Granular cell tumor; MPD: main pancreatic duct; PV: portal vein.

Figure 2 CT image of pancreatic GCT. A: CT showing poor enhancement of the tumor compared with that of the surrounding pancreatic parenchyma at early phase o dynamic CT (arrow); B: CT showing gradual enhancement of the tumor at delayed phase (arrowhead). CT: Computed tomography.

Figure 3 MRI findings of pancreatic GCT. A: The tumor showed a hypointense mass in the T1-weighted image (arrow); B: The surrounding and center of the tumor were hypointense and hyperintense on T2-weighted image, respectively (arrowhead). MRI: magnetic resonance imaging.

Figure 4 ERCP showing the stricture and the dilatation in the distal pancreatic duct (arrow). ERCP: Endoscopic retrograde cholangiopancreatography.

Figure 5 Histological findings. A: Microscopic study showed a well-limited nodule made of large clusters of benign cells with small nuclei and abundant granular cytoplasm; B: S-100 protein staining was positive in the cell cytoplasm.