Stage IIIA adenocarcinoma of the esophagus; drawing shows the esophagus and stomach. A two-panel inset shows the layers of the esophagus wall: the mucosa layer, thin muscle layer, submucosa layer, thick muscle layer, and connective tissue layer. The left panel shows cancer in the mucosa layer, thin muscle layer, and submucosa layer and in 3 lymph nodes near the tumor. The right panel shows cancer in the mucosa layer, thin muscle layer, submucosa layer, and thick muscle layer and in 1 lymph node near the tumor.