Esophageal Cancer develops in the esophagus, a tube-like structure that runs from your throat to your stomach. It starts in the inner layer (the mucosa) and grows outward (through the submucosa and the muscle layer).
There are two main types of esophageal cancer: Squamous cells line the inner esophagus and cancer developing from squamous cells can occur along the entire esophagus is called Squamous Cell Carcinoma. The cancer that develops from gland cells is another type of esophageal cancer called adenocarcinoma. Gastroesophageal reflux disease and Barrett esophagus may increase the risk of esophageal adenocarcinoma.
Some of the symptoms of the esophageal cancer are difficulty or pain in swallowing, weight loss, and pain in chest, coughing, hoarseness, indigestion and heartburn. This cancer is often diagnosed at an advanced stage because there are no early signs or symptoms. It can be detected through Barium swallow X-ray, Endoscopy, Biopsy, CT scan, PET scan, Thoracoscopy and Laparoscopy.