Bone invasion by oral squamous cell carcinoma

Area of Science:

• Oncology
• Oral Pathology
• Bone Biology

Background:

• Oral squamous cell carcinoma (OSCC) can invade the maxilla or mandible, classified as T4a (stage IVA) when breaching cortical bone.
• Bone invasion by OSCC is an adverse prognostic factor, complicating diagnosis and treatment, and is mediated by osteoclast activation.
• Key molecular players in osteoclastogenesis, including receptor activator of NF-kB (RANK), RANK ligand (RANKL), and osteoprotegerin (OPG), are implicated.

Purpose of the Study:

• To review the cellular and molecular mechanisms of bone invasion by OSCC.
• To describe the histological patterns of bone invasion.
• To outline the detection methods for OSCC bone invasion.

Main Methods:

• Literature review of cellular and molecular mechanisms.
• Analysis of histological patterns of bone invasion.
• Evaluation of imaging techniques (CT and MRI) for detection.

Main Results:

• Bone destruction is primarily mediated by activated osteoclasts, influenced by the RANK/RANKL/OPG system.
• Histological patterns include erosive, mixed, and infiltrative invasion.
• CT and MRI are primary imaging modalities for assessing bone invasion.

Conclusions:

• Understanding the mechanisms and patterns of OSCC bone invasion is crucial for improved diagnostics and therapeutics.
• Advanced imaging techniques aid in the detection and staging of bone invasion.
• Further research into the molecular pathways could offer novel therapeutic targets.