Figure 3

Pathology of GIST after ESD with enucleation. a. A well-defined tumor surrounded by a thin capsule (Hematoxylin-eosin, 1x). b. A spindle cell tumor surrounded by fibrous tissue (Hematoxylin-eosin, 400x). c. The tumor cells are positive for c-Kit with immunohistochemical stain (200x).