Almost my entire career has been built around two worlds that, for many years, ran in parallel. One is the world of brain tumor surgery: craniotomies, microsurgery, stereotactic radiosurgery, the discipline of deciding how much to resect and how much to preserve. The other is the world of pain, particularly trigeminal neuralgia, that electric jolt through the face that can turn something as simple as chewing, speaking, or feeling a breeze into an unbearable event.
For a long time I treated these as belonging to different parts of my practice. One was oncologic. The other was functional. But there is a subgroup of patients in whom these two worlds stop being separate and become exactly the same problem: trigeminal neuralgia caused by a tumor.
We recently published a narrative review in Cureus dedicated precisely to this intersection, focused on the contemporary role of radiosurgery in tumor control and pain relief when trigeminal neuralgia has a tumoral cause.
A pain with two origins at once
Tumor-related trigeminal neuralgia is uncommon, but it is clinically distinct from classic neuralgia. Here, the responsible lesion is not only the generator of facial pain. It is, simultaneously, an independent oncological problem that must be controlled in its own right, regardless of what happens to the pain.
That reframes the clinical question. It is not simply about relieving pain. It is about controlling the tumor and relieving the pain, two goals that do not always move at the same pace or respond the same way to the same treatment.
For this review, we purposively assembled a core evidence base of fourteen studies: comparative cohorts reporting outcomes from both microsurgery and radiosurgery, contemporary radiosurgical series reporting pain outcomes by anatomical target, and systematic reviews or meta-analyses synthesizing either modality. Wherever possible, we treated tumor control and pain relief as separate endpoints, exactly as they behave in real clinical practice.
What the available evidence shows
When anatomically feasible, microsurgical treatment remains the preferred approach for achieving rapid, deep, and durable pain relief, particularly when decompression of the trigeminal nerve can be achieved. Across the comparative cohorts and pooled analyses we reviewed, microsurgery was associated with a higher proportion of favorable pain outcomes and, in one meta-analysis, a longer median time to pain recurrence, while tumor control was equivalent between the two modalities, principally in petroclival and petrous apex meningiomas.
However, there is a clinically important subset of patients who are not suitable candidates for open surgery because of age, comorbidities, tumor anatomy, or operative risk, and others who simply decline it. For these patients, radiosurgery represents a genuinely important noninvasive strategy, although its role in pain control is different from its already well-established role in tumor control.
Radiosurgery achieves excellent tumor control. The pain relief it produces, by contrast, tends to be more modest, delayed, and can attenuate over time. Its principal role, therefore, is not to replace microsurgery in otherwise suitable surgical candidates, but to offer a noninvasive option when surgery carries substantial anatomical or medical risk, or when the patient declines it.
One finding I find particularly interesting, and one that probably deserves further research, is that radiosurgical pain relief cannot be explained solely by tumor volume reduction. The exact mechanism remains unresolved. The characteristic complication of radiosurgery in this setting is trigeminal sensory dysfunction, which is frequently permanent and should be discussed openly with the patient before deciding on treatment.
The honest limits of what we know
As in any serious review, it is also important to state what the literature does not yet allow us to conclude. Outcome definitions for pain varied between studies, the cohorts were not independent of one another, and none of the comparisons was randomized. For that reason, the observed associations cannot be interpreted as causal and may be influenced by confounding by indication, meaning the clinical reasons that led to choosing one treatment over another for each patient.
The optimal radiosurgical target also remains unresolved. Every series combining different anatomical targets includes fewer than twenty patients, too small a number to draw definitive conclusions. That is why, in our practice, anatomy-driven, individualized selection — incorporating the tumor-nerve relationship, the patient's surgical candidacy, nerve visibility on imaging, and the feasibility of an alternative or staged treatment — remains the most defensible approach given the current evidence.
Why this publication unites two worlds of my work
I have dedicated a large part of my career to brain tumor surgery, microsurgery, and stereotactic radiosurgery as oncological tools. I have also dedicated years to trigeminal neuralgia and facial pain treatment as an independent functional problem. This publication sits exactly at the point where both worlds converge, which is why I consider it one of the most important pieces we have produced this year.
Treating tumor-related trigeminal neuralgia well requires, at the same time, the oncological judgment of knowing when to resect, when to irradiate, and when to observe, and the functional judgment of understanding what facial pain truly means for a patient's daily life. No algorithm replaces that dual perspective. It takes experience in both worlds to make the right decision for each individual patient.
That, ultimately, is why these two parts of my practice — the oncologic and the functional — should never have been fully separate to begin with. When a tumor generates facial pain, we are not treating two different diseases. We are treating a single disease that demands a single coherent strategy, built with the tools of both worlds.
You can read the full study, “Tumor-Related Trigeminal Neuralgia: Clinical Features, Pathophysiology, and the Contemporary Role of Radiosurgery in Tumor Control and Pain Relief,” published in Cureus Journal of Medical Science (DOI: 10.7759/cureus.116049).Related treatment area
Radiosurgery and Non-Invasive Treatments — Stereotactic radiosurgery for trigeminal neuralgia, brain tumors, and functional disorders, including tumor-related trigeminal neuralgia.