Eagle Syndrome

Eagle syndrome is a pain condition that develops when a thin bony projection extending downwards from the underside of the skull (the styloid process) is longer than normal, or when the ligament attached to it becomes calcified. It presents as pain on one side of the throat that worsens on swallowing and radiates to the ear. It is not a neck cyst; it is covered in this section because it is one of the lesser-known causes of throat and neck pain.

What is Eagle syndrome?

The styloid process is a pointed bony projection that emerges from the skull just below the ear and serves as an attachment point for muscles of the tongue, throat and larynx. Its tip is connected to the hyoid bone by a thin ligament (the stylohyoid ligament). If this projection is longer than usual, or if the ligament has calcified and hardened, it can press on the surrounding nerves and vessels. An elongated styloid process does not cause complaints in everyone; when symptoms appear, the condition is called Eagle syndrome. Tissue stiffening after tonsil surgery can also trigger the symptoms.

Symptoms

• Dull or stabbing pain on one side of the throat, worsening on swallowing, yawning or turning the head
• Pain radiating to the ear on the same side
• A foreign-body sensation, as if something is stuck in the throat
• Pain at the angle of the jaw and the upper part of the neck, sometimes spreading to the face
• Difficulty swallowing
• Rarely, dizziness, ringing in the ears or headache

The symptoms can last for months and are often mistaken for a throat infection, a dental problem or a jaw joint disorder.

Diagnosis

Diagnosis begins with the history; pain that is one-sided and worsens on swallowing is a guiding feature. On examination, reproduction of the exact pain when the tonsil bed is pressed with a finger is a typical finding. Computed tomography (CT) is requested for a definitive diagnosis; with three-dimensional reconstruction, the length and direction of the styloid process are seen in detail. Diseases of the teeth, jaw joint, throat and larynx that could cause pain in the same area are ruled out by examination.

Treatment options

Treatment is planned according to the severity of the symptoms and how much they affect daily life:

• Conservative treatment: Pain-relieving medication, muscle-relaxing measures and, when needed, injections targeted at the area can bring relief in mild cases.
• Surgical treatment: If the symptoms persist, shortening the elongated part of the styloid process (styloidectomy) is the permanent solution. The procedure can be performed through the mouth or through a small incision in the neck. The approach through the mouth leaves no scar on the skin, while the neck approach gives a wider view of the process. Endoscope-assisted methods with a smaller incision and less tissue damage are also in use.

What to expect after surgery

The operation is performed under general anaesthesia. Afterwards, throat pain and tenderness on swallowing lasting a few days are normal; soft and lukewarm foods are recommended in the first days. After operations through the mouth, recovery resembles that after tonsil surgery. Improvement of the symptoms can sometimes take a few weeks; the irritation around the nerve needs time to settle.

When should you see a doctor?

• If you have pain on one side of the throat that worsens on swallowing and has persisted for weeks
• If the pain radiates to the ear and continues without any sign of infection
• If you have a constant foreign-body sensation in the throat or difficulty swallowing

These symptoms can also occur in other conditions; the cause should be clarified by examination and imaging.