Endoscopic characteristics of small intestinal malignant tumors observed by balloon-assisted enteroscopy

Figure 4 Endoscopic and pathological images of malignant lymphoma without white villi appearance. A, B: Representative endoscopic and pathological images of malignant lymphoma without white villi appearance (Follicular lymphoma) [A: White light image shows enlarged villi with stenosis, without white villi appearance in the ileum (with stenosis); B: Pathological image is showing the lymphoma cells sparsely infiltrating the villi, some lymphoma cells present in the deep mucosa (blue arrow), immunohistochemical staining for bcl-2, ×10]; C, D: Representative endoscopic and pathological images of malignant lymphoma without white villi appearance (Mantle cell lymphoma) (C: White light image with indigo carmine staining shows multiple polyposis with ulceration, without white villi appearance in the ileum; D: Pathological image is showing the lymphoma cells infiltrating the mucosa without an intact epithelium, immunohistochemical staining for cyclin D1, ×10).