Oromandibular cancer is a term used for cancers that involve the lower jaw (mandible). In almost all cases, this happens when a tumour from one of the oral cavity subsites invades into the mandible.
However, there are times when tumours can arise directly from the bone. The oral cavity subsites include:
- Buccal mucosa
- Oral tongue
- Hard palate
- Floor of mouth
- Upper and lower alveolar ridge
- Retromolar trigone
Of these subsites, cancers of the floor of mouth, alveolar ridge and retromolar trigone are the most likely to invade into the mandible, mainly because they are located immediately next to the mandible.