- The most common oral malignant tumor.
- Squamous cell carcinomas of the oral mucosa in their latter stages invade the underlying bone.
- Ill-defined moth-eaten radiolucency. Destruction of alveolar ridge along with a soft tissue mass.
- Adjacent teeth: displacement loosened or resorbed.
- Ultimately a pathological fracture may result.
Squamous cell carcinoma

Features
Differential diagnosis
- Malignant lymphoma (ill defined)
- Malignant salivary gland tumors
- Metastatic tumors (ill defined)
- Osteogenic sarcoma (ill defined)
- Osteomyelitis (ill defined)