Glossary of Medical Terms

stage IVB lip and oral cavity cancer

Stage IV is divided into stages IVA, IVB, and IVC. In stage IVB, (1) the tumor may be any size and has spread to one or more lymph nodes that are larger than 6 centimeters; or (2) the tumor has spread further into the muscles or bones in the oral cavity, or to the base of the skull and/or the carotid artery. Cancer may have spread to one or more lymph nodes anywhere in the neck.

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