Fig. 1
From: Primary amelanotic malignant melanoma of the esophagus: a case report
a Upper gastrointestinal endoscopy showed a type 1 tumor in the lower thoracic esophagus. b Constructed radiography showed the main tumor lesion on the left antero-lateral esophageal wall. c Contrast-enhanced CT showed that this tumor lesion measured 3 cm and occupied the esophageal lumen. d Positron emission tomography CT showed an uptake in the lower thoracic esophagus and no findings of lymph metastasis