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Esophageal cancer can also spread to the lungs, liver, stomach, and other parts of the body. There are two major types of esophageal cancer: 1  Squamous cell carcinoma. 2  This type of esophageal cancer starts in squamous cells that line the esophagus. 3  It usually develops in the upper and middle part of the esophagus.
The lungs are the primary organs of respiration in humans and many other animals. Humans have two lungs, a right lung and a left lung. They are situated within the thoracic cavity of the chest. The right lung is bigger than the left lung, as the left lung shares space in the chest with the heart. The lungs together weigh approximately 1.3 kilograms (2.9 lb), with the right lung weighing more than the left.