NCI Dictionary of Cancer Terms
The search textbox has an autosuggest feature. When you enter three or more characters, a list of up to 10 suggestions will popup under the textbox. Use the arrow keys to move through the suggestions. To select a suggestion, hit the enter key. Using the escape key closes the listbox and puts you back at the textbox. The radio buttons allow you to toggle between having all search items start with or contain the text you entered in the search box.
stage I esophageal squamous cell carcinoma (... ee-SAH-fuh-JEE-ul SKWAY-mus sel KAR-sih-NOH-muh)
Stage I is divided into stages IA and IB, depending on where the cancer is found. In stage IA, cancer has formed in the inner (mucosal) layer of the esophageal wall. The tumor cells look a lot like normal cells under a microscope. In stage IB, cancer has formed (1) in the inner (mucosal) layer of the esophageal wall. The tumor cells do not look at all like normal cells under a microscope; or (2) in the inner (mucosal) layer and spread into the middle (muscle) layer or the outer (connective tissue) layer of the esophageal wall. The tumor cells look a lot like normal cells under a microscope. The tumor is in the lower esophagus or it is not known where the tumor is.