The type tells you what type of cell the cancer started in. The grade tells you how much the cancer cells look like normal cells. The stage of a cancer tells you how big it is and whether it has spread. They all help your doctor decide which treatment you need.
Most mouth and oropharyngeal cancers are squamous cell cancers. But there are less common types.
There are 4 main stages in this system (stage 1 - 4). Some doctors also use stage 0.
Find out about tumour, node and metastasis (TNM) staging system and treatment for mouth and oropharyngeal cancer.