Figure 1

Pathological diagnoses of serosal invasion in GISTs by Hematoxylin-Eosin staining. (A) Intestinal GIST invading the primary serosa layer. (B) Intestinal GIST invading the serosa of adjacent colon. (C) Gastric GIST invading the pancreatic capsule. (D) Intestinal GIST invading the peritoneum.