Gastrointestinal tumors in transplantation: Two case reports and review of literature

Figure 1 Histopathological features of case 1 gastrointestinal stromal tumor. A: Hematoxylin and eosin staining showing exophytic development of a tumor from the mucosa musculus (magnification, 2.5 ×); B: Hematoxylin and eosin staining showing spindle cell morphology composed of relatively uniform cells arranged in short fascicles (magnification, 20 ×); C: Immunohistochemistry showing strong positive staining for the protooncogene c-KIT (white asterisk; magnification, 5 ×); D: Immunohistochemistry showing strong positive staining for discovered on gastrointestinal stromal tumor protein 1 (white asterisk; magnification, 5 ×). M: Mucosa; MM: Mucosa musculus; T: Tumor.