Parapharyngeal abscess


A parapharyngeal abscess is a deep neck space abscess of the parapharyngeal space, which is lateral to the superior pharyngeal constrictor muscle and medial to the masseter muscle. This space is divided by the styloid process into anterior and posterior compartments. The posterior compartment contains the carotid artery, internal jugular vein, and many nerves.

Signs and symptoms

Symptoms include fever, sore throat, painful swallowing, and swelling in the neck.
An anterior space abscess can cause lockjaw, and hard mass formation along the angle of the mandible, with medial bulging of the tonsil and lateral pharyngeal wall. A posterior space abscess causes swelling in the posterior pharyngeal wall, and lockjaw is minimal. Other structures within the carotid sheath may be involved, causing rigors, high fever, bacteremia, neurologic deficit, or a massive haemorrhage caused by carotid artery rupture.

Cause

Infection can occur from:
Both genders are equally affected. Any age group can develop a parapharyngeal abscess but it is most commonly seen in children and adolescents. Adults who are immunocompromised are also at high risk.