A rare synchrony of adenocarcinoma of the ampulla with an ileal gastrointestinal stromal tumor: A case report

Figure 7 Histopathology of the surgically resected ampullary mass and ileal mass. A: Low-power micrograph of invasive adenocarcinoma arising from a tubulovillous adenoma with high-grade dysplasia in the ampullary region (hematoxylin and eosin stain, original magnification 20 ×); B: High-power micrograph of ampullary mass showing malignant glands (hematoxylin and eosin stain, original magnification 100 ×); C: Low-power photomicrograph of ileal mass showing the spindle cell morphology of a gastrointestinal stromal tumor (GIST) (hematoxylin and eosin stain, 100 × original magnification); D: A high-power view of cellular mitosis within the ileal GIST (hematoxylin and eosin stain, 600 × original magnification) showed 15 mitoses per 5 square millimeters; E: Immunohistochemical staining for CD117 showing strong and diffuse cytoplasmic immunoreactivity confirming GIST (hematoxylin and eosin stain, 100 × original magnification).