Esophageal myoepithelial carcinoma: Four case reports

Figure 1 Chest computed tomography images of patient 1. A: Unenhanced computed tomography shows local thickening and luminal narrowing of the esophagus (orange arrow) with an evident fat space between the lesion and surrounding tissues; B: After contrast injection, the mass showed mild homogeneous enhancement with no cystic changes or necrosis.

Figure 2 Chest computed tomography images of patient 2. A and B: Computed tomography scan showed an intraluminal mass (fungating-type) of the middle esophagus with ulcers (orange arrow) and cystic changes, or necrosis; C and D: After contrast injection, the mass showed heterogeneously, marked enhancement.

Figure 3 Computed tomography images, hematoxylin and eosin staining, and SOX-10 immunohistochemistry of patient 3. A: Enhanced computed tomography (CT) showed thickening with eccentric stenosis of the middle esophagus, with a complete mucosal layer and cystic change or necrosis(orange arrow); B: At the four-month review, chest CT revealed multiple lung metastases (orange arrow); C: At the four-month review, enhanced CT revealed a cystic-solid mass (orange arrow) near the anastomosis; D: HE staining showed mainly epithelioid cells with hyperchromatic and pleomorphic nuclei and infiltrative growth toward the periphery. (Magnification × 40); E: Immunohistochemistry showing the expression of SOX-10. (Magnification × 40).

Figure 4 Chest computed tomography images of patient 4. A and B: A mass (orange arrow) protruding into the lumen with a complete mucosal layer. Enhanced computed tomography showed mild and homogeneous enhancement. No cystic change or necrosis was observed.