Synchronous primary carcinosarcoma and adenosquamous carcinoma of the esophagus.

Reports of adenosquamous carcinoma and carcinosarcoma found at the same esophagus are rare in the literature. We report a case of synchronous adenocarcinoma and carcinosarcoma of the esophagus. The sarcomatous components were immunoreactive for vimentin. Carcinoma, sarcoma, and adenocarcinoma cells distinctively metastasized to different lymph nodes. Further investigations are required to reveal the biological behavior of the tumor.