Intro
This article is about the pterygopalatyne, also called sphenopalatine ganglion radiofrequency. Such a procedure is a useful treatment we often apply, after a meticulous examination and a predictive transmucosal block.
Cluster headache is often described as one of the most intense pains a person can experience. For some patients, even the most advanced medications are not enough.
This is the story of a patient who had been living with daily attacks despite multiple therapies — and how a targeted interventional approach changed the course of his condition.
The patient
A 34-year-old man came to our attention after 9 years of chronic cluster headache. His pain was:
- severe, bilateral, behind the eye
- associated with tearing and nasal congestion
- occurring 5 to 8 times a day
Despite appropriate medical therapy — including verapamil, corticosteroids, and oxygen — the attacks persisted, being more severe in the last 9 months. Over time, the condition had a profound impact on his quality of life.
He couldn’t work anymore as a IT specialist, he did not drive for long distances anymore. He came to my office with his desperate father from Trieste, several hundreds of kilometres away from Turin.
Why look beyond medication
In some patients, cluster headache is sustained by specific neural circuits that are not sufficiently controlled by drugs alone. One of the key structures involved is the sphenopalatine ganglion (SPG) — a small but critical hub in the autonomic nervous system of the face. Targeting this structure can interrupt the mechanisms that sustain the attacks.
The SPG block
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The sphenopalatine ganglion radiofrequency
We proposed a minimally invasive procedure: pulsed radiofrequency of the sphenopalatine ganglion. Using imaging guidance, a fine needle is positioned precisely near the target. The technique does not destroy the nerve, but modulates its activity.
The goal is not simply to block pain temporarily, but to reset abnormal pain signaling.
What happened next
The effect was not only immediate — it was sustained. The patient (as it happens in most cases), did not feel a gradual benefit. Only after 5 weeks he felt an abrupt change!
• the intensity of pain significantly decreased
• the frequency of attacks dropped markedly
• the patient progressively reduced the need for rescue medication, maintaining a low dose of corticosteroids for 5 months
At 3 months, the improvement was stable and clinically meaningful. By now 11 months have passed and the benefit is still present.
What this means
Not all chronic pain requires more medication. In selected cases, a targeted interventional approach can:
• act directly on the source of the problem
• reduce the burden of pharmacological therapy
• restore a better quality of lifeFinal message
Cluster headache can be devastating — especially when it becomes refractory to medications. When standard treatments fail, there are still options.
Patients with persistent or refractory cluster headache may benefit from a dedicated interventional evaluation.
Interventional pain management is not a last resort.
It is a different, more precise way to approach pain.
Pulsed Radiofrequency of the Sphenopalatine Ganglion for Refractory Cluster Headache: A Clinical Case Report
The professional version
Cluster headache is among the most severe primary headache disorders and may become refractory despite optimal pharmacological management.
The sphenopalatine ganglion (SPG) plays a central role in the pathophysiology of trigeminal autonomic cephalalgias, representing a potential target for interventional therapies.
Pulsed radiofrequency (PRF) has emerged as a neuromodulatory technique capable of selectively influencing pain pathways without causing neural destruction.
A 34-year-old man came to our attention after 9 years of chronic cluster headache. Clinical features included:
• severe bilateral orbital pain (VAS 9–10)
• ipsilateral autonomic symptoms (lacrimation, nasal congestion)
• attack frequency of 5-8 episodes per day
The patient had previously undergone multiple pharmacological treatments, including:
• high-dose verapamil
• lithium
• corticosteroids
• oxygen therapy
• triptans
Despite these therapies, the condition remained refractory, with significant impairment in quality of life.
A pulsed radiofrequency treatment of the sphenopalatine ganglion was performed under fluoroscopic guidance.
The procedure included:
• image-guided needle placement via a targeted approach
• sensory stimulation to confirm accurate positioning
• application of pulsed radiofrequency at standard parameters (42°C)
The intervention was conducted under sterile conditions and was well tolerated, with no immediate or delayed complications.
Following the procedure:
• pain intensity decreased significantly
• attack frequency was markedly reduced within days
• the need for rescue medication progressively declined
At 3-month follow-up:
• reduction in attack frequency exceeded 70%
• quality of life improved substantially
• no adverse effects were reported
The sphenopalatine ganglion represents a key structure in cranial parasympathetic outflow and is critically involved in the mechanisms underlying cluster headache.
Pulsed radiofrequency provides:
• selective neuromodulation
• preservation of neural integrity
• a favorable safety profile
In patients with refractory disease, this technique may offer a targeted alternative to long-term pharmacological strategies.
Pulsed radiofrequency of the sphenopalatine ganglion is a safe and effective option in selected patients with refractory cluster headache.
Interventional pain management allows a mechanism-based approach, focusing on the modulation of pain pathways rather than symptomatic suppression alone.
Patients with refractory cluster headache may benefit from a targeted interventional evaluation to determine the most appropriate treatment strategy.
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