Glossopharyngeal neuralgia

What is glossopharyngeal neuralgia?

Glossopharyngeal neuralgia is a rare neurological disorder characterized by episodes of pain with the following features:

• Paroxysmal, unilateral and lancinating, similar to an electric shock.
• Located in the area innervated by the glossopharyngeal nerve, which includes the base of the tongue, pharynx, ear, angle of the jaw and, in some cases, the tonsillar region.
• Short duration of episodes, with interspersed asymptomatic periods.
• Triggered by specific stimuli, such as swallowing, chewing, coughing, speaking or yawning.

In some patients, glossopharyngeal neuralgia may cause fainting (syncope), due to the connection of the nerve with the cardiovascular system. Its main cause is compression of the glossopharyngeal nerve by vascular structures, although it may also be related to tumors, infections or trauma.

How is it diagnosed?

Diagnosis is based on clinical history and neurological examination, which is usually normal. It is advisable to perform a cranial MRI to evaluate if there is a vascular growth and to rule out secondary causes, such as tumors or vascular malformations that may be compressing the nerve.

Since it is a rare pathology, it can be confused with other causes of oropharyngeal or facial pain, such as trigeminal neuralgia, referred otalgia or temporomandibular joint disorders.

How is glossopharyngeal neuralgia treated?

Treatment is usually initiated with neuromodulatory drugs such as carbamazepine or gabapentin, which help to reduce nerve excitability. In more severe or drug-resistant cases, surgical procedures such as microvascular decompression may be considered.

Although it is a rare condition, there are therapeutic options that can significantly improve the quality of life of those who suffer from it.