Esophageal webs are thin mucosal membranes that project into the esophageal lumen, causing constriction. They more commonly occur in the cervical esophagus near the cricopharyngeus muscle. Associations include Plummer-Vinson syndrome, graft-versus-host disease, and gastroesophageal reflux disease. On barium swallows, esophageal webs appear as smooth tapered concentric narrowing in the cervical esophagus.