A patient with a parotid abscess develops a spread of infection to the parapharyngeal space. Which anatomical barrier is breached to allow this spread?
- A Stylomandibular ligament
- B Deep investing fascia of the neck
- C The deep lobe of the parotid projects medially through the stylomandibular tunnel into the parapharyngeal space ✓
- D Pharyngobasilar fascia
Correct answer: C. The deep lobe of the parotid projects medially through the stylomandibular tunnel into the parapharyngeal space
Explanation
The parotid gland has superficial and deep lobes. The deep lobe extends medially through the stylomandibular tunnel (a gap between the stylomandibular ligament and the posterior border of the mandibular ramus) into the parapharyngeal space. Parotid abscesses or tumors (especially pleomorphic adenoma of the deep lobe) can present as oropharyngeal bulges because of this direct anatomical communication. The stylomandibular ligament is not a complete barrier to deep lobe extension.
Reference: BD Chaurasia's Human Anatomy, 8th ed.
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Written and medically reviewed by the StethoPrep medical team.