Gastric carcinoid tumor in a patient with a past history of gastrointestinal stromal tumor of the stomach

Figure 1 Gastroscopic findings. A: 1.2 cm ulcerated polyp in the cardia (arrow); B: 0.6 cm polyp on the anterior wall of the corpus near the previous anastomosis (arrow).

Figure 2 Carcinoid tumor. A: Uniform round-to-oval cells in trabeculae, nests, and gland-like structures (hematoxylin and eosin, × 100); B: Positive immunohistochemical staining for synaptophysin (× 100); C: Negative immunohistochemical staining for CD 34 (× 100); D: Negative immunohistochemical staining for CD 117 (× 100).

Figure 3 Recurrent gastrointestinal stromal tumor. A: Composed of spindle cells (hematoxylin and eosin × 100); B: Positive immunohistochemical staining for CD34 (× 100); C: Positive immunohistochemical staining for CD 117 (× 100).