| http://www.w3.org/ns/prov#value | - Some of the tests used to diagnose esophageal cancer are also used to stage the disease, including MRI, CT scan and PET scan.Symptoms of Esophageal CancerAt a very early stage, esophageal cancer may not show any symptoms and will only be detected during an upper endoscopy and biopsy.At more advance stages, the following symptoms can be present: Dysphagia (difficulty swallowing)Weight loss, fatigue
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