Oral Surgery · single question
A radiolucent lesion has perforated the lingual cortex of the mandible. What is the PRIMARY life-threatening concern?
Show answer and explanation
Correct answer: D. Cavernous sinus thrombosis via venous drainage
Lingual cortical perforation allows spread to pterygomandibular/parapharyngeal spaces and via the pterygoid plexus to the cavernous sinus — a potentially fatal complication.
- A. Lymphadenitis is an expected secondary finding with any dental infection and is far less acutely dangerous.
- B. Ipsilateral diffuse jaw spread is less acutely dangerous than intracranial venous involvement.
- C. Adjacent bone osteomyelitis is a local concern, not the primary life-threatening risk when the cortex has been breached.
- D. CORRECT. The primary concern is cavernous sinus thrombosis. The pterygoid venous plexus connects to the cavernous sinus, and lingual cortical perforation allows infectious spread along this route — a life-threatening intracranial complication.