Figures
![Figure 1.](/tables/jcs440-g001.jpg)
Figure 1. Computed tomography scan of the abdomen and pelvis with and without contrast. Axial (a), coronal (b), and sagittal (c) slices from the venous phase of a computed tomography scan demonstrating a 4.2 × 2.8 cm focus of duodenal wall thickening and soft tissue prominence concerning for a duodenal neoplasm.
![Figure 2.](/tables/jcs440-g002.jpg)
Figure 2. Computed tomography scan of the abdomen with and without contrast. An axial slice from the venous phase of a computed tomography scan showing a 2.4 × 2.2 cm heterogeneously enhancing soft tissue mass arising from the inferior aspect of the third portion of the duodenum.
![Figure 3.](/tables/jcs440-g003.jpg)
Figure 3. Computed tomography scan of the abdomen with and without contrast. An axial slice from the venous phase of a computed tomography scan showing a 3.7 × 2.8 cm right adrenal mass.
![Figure 4.](/tables/jcs440-g004.jpg)
Figure 4. Hematoxylin and eosin histology slides of the primary pancreatic ductal adenocarcinoma and neuroendocrine tumors. (a) Mixed pancreatic ductal adenocarcinoma (top) and well-differentiated neuroendocrine tumor (bottom) (× 40). (b) Neuroendocrine tumor component. (c) Pancreatic ductal adenocarcinoma component in a solid pattern with high-grade nuclei, prominent nucleoli, and frequent mitoses (× 400).
![Figure 5.](/tables/jcs440-g005.jpg)
Figure 5. Hematoxylin and eosin histology slides of the primary pancreatic ductal adenocarcinoma and neuroendocrine tumors. (a) Tumor invading the duodenal muscularis propria (× 200). (b) Pancreatic ductal adenocarcinoma with necrosis (× 100). (c) Psammomatous calcifications noted focally (× 200). (d) Tumor invading duodenal fat (× 200).
![Figure 6.](/tables/jcs440-g006.jpg)
Figure 6. Immunohistochemical staining of the primary tumor. IHC stains of the primary pancreatic adenocarcinoma and neuroendocrine collision tumor. (a) Chromogranin IHC stain (× 100). (b) CK7 IHC stain (× 200). (c) CDX2 IHC stain (× 400). IHC: immunohistochemical.
![Figure 7.](/tables/jcs440-g007.jpg)
Figure 7. Hematoxylin and eosin histology slides of the gastrointestinal stromal tumor. Gastrointestinal stromal tumor characterized by bland spindle cells with faintly eosinophilic cytoplasm in a syncytial pattern and elongated nuclei with inconspicuous nucleoli (a: × 40; b: × 100; c: × 200; d: × 400).
![Figure 8.](/tables/jcs440-g008.jpg)
Figure 8. Immunohistochemical stains of the gastrointestinal stromal tumor. (a) CD117 IHC stain (× 200). (b) CD34 IHC stain (× 200). IHC: immunohistochemical.
![Figure 9.](/tables/jcs440-g009.jpg)
Figure 9. Hematoxylin and eosin histology slides and immunohistochemical stains of the adrenocortical adenoma. (a) Adrenocortical adenoma (× 40). (b) Adrenocortical adenoma with the characteristic clear cells with abundant and finely vacuolated cytoplasm (× 100). (c) MELAN-A IHC stain (× 100). (d) Inhibin IHC stain (× 100). IHC: immunohistochemical.
![Figure 10.](/tables/jcs440-g010.jpg)
Figure 10. Hematoxylin and eosin histology slides and immunohistochemical stains of the neurofibroma. Neurofibroma characterized by Schwann cells with wire-like collagen fibrils and wavy serpentine nuclei with pointed ends (a: × 40; b: × 200). (c) SOX10 IHC stain (× 100). IHC: immunohistochemical.