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Stage IB esophageal squamous cell carcinoma
Pronunciation
Stage I is divided into stages IA and IB, depending on where the cancer is found. In stage IB, cancer has formed (1) in the mucosa or submucosa layer of the esophagus wall, and the cancer cells are grade 2 and 3. Grade 2 and 3 cancer cells look more abnormal under a microscope and grow and spread more quickly than grade 1 cancer cells; or (2) in the mucosa or submucosa layer and spread into the muscle layer or the connective tissue layer of the esophagus wall, and the cancer cells are grade 1. Grade 1 cancer cells look more like normal cells under a microscope and grow and spread more slowly than grade 2 and 3 cancer cells. The tumor is in the lower esophagus or it is not known where the tumor is. (NCI Dictionary)
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