Case Report
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Nov 14, 2011; 17(42): 4734-4738
Published online Nov 14, 2011. doi: 10.3748/wjg.v17.i42.4734
Figure 1
Figure 1 Coronal reformat of a contrast-enhanced chest computed tomography demonstrates a solid enhancing mass with soft tissue attenuation in the middle third of the esophagus (arrow) causing obstruction and proximal dilatation. The distal third of the esophagus (arrowheads) is unremarkable.
Figure 2
Figure 2 Upper gastrointestinal endoscopy of the patient. A: Soft polypoid tumor protruding to the esophageal lumen, located 25cm to 35cm from the incisors; B: A closer view of the lesion shows that tumor surface is darker than esophageal mucosa due to its melanin content.
Figure 3
Figure 3 Histopathological findings. A: Hematoxylin and eosin staining discloses crowded rounded or elongated cells within distinct cytoplasm and hyperchromatic nuclei (magnification, x 100); B: Immunohistochemical study for HMB45 (anti-melanoma protein mAb). The positive reaction (brown cytoplasmic reaction) supports the diagnosis of malignant melanoma (magnification, x 100).