The FDA designates Biostage’s (BSTG +30%) Cellspan Esophageal Implantan Orphan Drug for restoring the structure and function of the esophagus due to cancer, injury or congenital abnormalities.
http://seekingalpha.com/news/3228047-biostages-cellspan-implant-orphan-drug-restoration-esophagus
Biostage's Cellspan Implant an Orphan Drug for restoration of esophagus