Immunohistochemical and molecular genetic analyses of multiple sporadic gastrointestinal stromal tumors

Figure 1 Computed tomography revealed multiple tumors in the abdominal cavity (arrows).

Figure 2 Intraoperative findings showed the multiple submucosal tumors in the small intestine (arrows: A) and the largest resected tumor revealed the delle with ulceration and cruor (B).

Figure 3 Histological findings and immunohistochemical examination. A: Hematoxylin and eosin staining showed a spindle-cell morphology (original magnification 200 ×), B: An immunohistochemical examination revealed that the tumor cells were diffuse positive for KIT (original magnification 200 ×).

Figure 4 Sequence analysis of the c-kit exon 13 and Platelet derived growth factor receptor A exon 12. PDGFRA: Platelet derived growth factor receptor A.