​Added 06 March 2013

• Patients who have undergone treatment for superficial disease should have endoscopic surveillance.
  
• Patients who had radiation or surgery are at risk of developing esophageal strictures resulting in dysphagia which can be treated with dilation or stenting. There is no evidence that routine imaging or laboratory investigations are useful in detecting recurrences or metastases at a stage where interventions are curative. Early detection of asymptomatic metastases does not enhance survival.
  
• Investigations should be performed based the clinical presentation of a patient who is suspected of having recurrent or metastatic disease.​