What is Gamma Knife and how does it work?

In this article below, incredibly well-regarded and experienced consultant neurosurgeon, Mr George Samandouras explains what Gamma Knife is, outlines the associated benefits, before listing some of the risks involved.

What is Gamma Knife and how does it work?

Gamma Knife is a highly focused delivery of radiotherapy. It is typically performed during a day visit and is used as a treatment option for a number of benign and malignant brain tumours mainly. With Gamma Knife treatment, there is no need for repeated weekly treatments.

The process involves four steps: application of a frame resembling a helmet, a high resolution and detailed MRI brain scan with the frame on, visualisation, planning and targeting of the lesion(s) using an advanced planning software, and finally, the delivery of treatment using one of the latest Gamma Knife models that resembles a scanner.

What are the benefits of using Gamma Knife for brain metastases treatment?

Gamma Knife can be used for patients that have more than one lesion either on one or both sides of the brain. Lesions that are deep in the brain or close to very sensitive structures can be targeted effectively with Gamma Knife. 

How effective is Gamma Knife in treating brain metastasis compared to other treatments?

Following open surgery for large, single metastases, Gamma Knife is now used to boost the surgical cavity, which means that recurrences are significantly delayed.

What are the risks and side effects of Gamma Knife treatment for brain metastasis?

Although rare, side effects can occur. The main ones include infection or bruising of the scalp from the pin sites and local brain swelling. Rarer risks include haematoma, stroke, or seizures. Patients will not be allowed to drive for a month following Gamma Knife.

Is Gamma Knife treatment suitable for all patients with brain metastasis?

This depends on the number of brain lesions, the size, and location of each lesion, the primary cancer, the severity and spread of the primary cancer, and how well the patient feels and performs in daily activities.

To consult further with Mr George Samandouras, simply head to his Top Doctors profile today.