NCI Dictionary of Cancer Terms
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stage IVB hypopharyngeal cancer (... HY-poh-fuh-RIN-jee-ul KAN-ser)
Stage IV hypopharyngeal cancer is divided into stages IVA, IVB, and IVC. In stage IVB, the tumor (1) has spread to muscles around the upper part of the spinal column, the carotid artery, or the lining of the chest cavity and may have spread to lymph nodes, which can be any size; or (2) may be any size and has spread to one or more lymph nodes that are larger than 6 centimeters.