Esophageal mesenchymal tumors: Endoscopy, pathology and immunohistochemistry

Figure 1 Endoscopic image of esophageal stromal tumors.

Figure 2 Endoscopic image of leiomyomas.

Figure 3 EUS image of esophageal stromal tumors: originated from muscularis propria.

Figure 4 EUS image of leiomyomas: originated from muscularis mucosa.

Figure 5 Malignant esophageal stromal tumor: tumor cells were intensely stained, but there was no visible mitoschisis. (HE × 200).

Figure 6 Esophageal leiomyoma: cells were all spindle, with abundant eosinophilic cytoplasm (HE × 200).

Figure 7 Expression of CD117(× 200) and CD 34 (× 400) in malignant esophageal stromal tumor: showing yellow or brown granules in cell cytoplasm and (or) membrane. A: CD117; B: CD34.

Figure 8 Expression of SMA (A) and Desmin (B) in esophageal leiomyomas (× 200): showing yellow or brown granules in cell cytoplasm.