Surgical techniques

CyberKnife Radiosurgery

Millimeter Precision for Treating Brain Tumors Without Surgery

An advanced, non-invasive alternative for patients with brain tumors or intracranial lesions

In recent years, advances in neurosurgery have made it possible to treat complex brain pathologies without the need for open surgical intervention. One of the most innovative and effective methods is CyberKnife robotic radiosurgery, a system that uses highly precise radiation beams to treat intracranial tumors and lesions with millimeter accuracy, without the need for a scalpel or general anesthesia.
At Arráez Institute, a reference center for advanced neurosurgery based in Malaga, the team led by Dr. Miguel Ángel Arráez offers this cutting-edge technology as part of its commitment to personalized, safe, and minimally invasive medicine.

What is CyberKnife radiosurgery?

The CyberKnife system is a robotic radiosurgery platform that combines a high-precision linear accelerator with a robotic arm and an advanced image-guided system. Unlike traditional surgery, no incisions are made, and the patient's brain is not physically accessed.

CyberKnife directs radiation beams very precisely, destroying tumor or pathological cells while maximally sparing surrounding healthy tissue. Thanks to its real-time tracking system, it can adapt to small patient or lesion movements during treatment, ensuring constant precision.

It is a non-invasive radiosurgery, ideal for patients who cannot undergo surgery due to their age, general health status, or tumor location.

CyberKnife radiosurgery is indicated for various cases, including: * **Brain tumors:** Both malignant and benign tumors, including gliomas, meningiomas, and pituitary adenomas. * **Spine tumors:** Tumors in the spinal cord and surrounding areas. * **Lung cancer:** Early-stage non-small cell lung cancer, as well as metastatic lung tumors. * **Prostate cancer:** Both localized and recurrent prostate cancer. * **Pancreatic cancer:** As an adjunct treatment for unresectable pancreatic cancer. * **Liver cancer:** Primary liver cancer and metastases from other sites. * **Kidney cancer:** Small renal cell carcinomas. * **Metastatic disease:** Cancer that has spread to other parts of the body, such as the brain, spine, liver, and lungs. * **Arteriovenous malformations (AVMs):** Abnormal tangles of blood vessels in the brain. * **Trigeminal neuralgia:** A chronic pain condition affecting the trigeminal nerve.

CyberKnife is especially useful for treating brain or skull base lesions that, due to their location or size, would be very difficult or risky to operate on using conventional surgery. Among its main indications are:

  • Benign brain tumors
  • Meningiomas
  • Acoustic Neuromas (Vestibular Schwannomas)
  • Pituitary adenomas
  • Malignant tumors or brain metastases
  • Primary brain cancer
  • Metastatic lesions from other organs (breast, lung, kidney...)
  • Other neurological injuries
  • Trigeminal neuralgia
  • Arteriovenous Malformations (AVMs)
  • Incomplete surgical resections


Each case is individually assessed by the Arráez Institute's medical team, who analyze whether CyberKnife is the most suitable option for the patient or if it should be combined with other treatments.

Patient Benefits

The CyberKnife radiosurgery offers numerous advantages over open surgery and other conventional radiotherapy treatments:


Outpatient and pain-free treatment
The procedure does not require hospitalization or general anesthesia. The patient remains comfortably lying down while the treatment is applied, which can last between 30 and 90 minutes.

High precision and maximum security

CyberKnife is capable of irradiating with sub-millimeter accuracy, minimizing the risk of damaging healthy or sensitive brain structures near the lesion.

Fast recovery and minimal disruption to daily life
With no wounds, stitches, or scars, the patient can resume their usual routine in a very short time, without the risks associated with traditional surgery.

Possibility of treating inoperable injuries
In cases where open surgery is not viable due to the tumor's location or the patient's condition, CyberKnife represents a real and effective alternative.

What is the step-by-step treatment process?

At Arráez Institute, CyberKnife treatment is performed following a carefully designed protocol to ensure the best results:

Medical evaluation
The first step is a comprehensive evaluation by the neurosurgery and radiation oncology team. Images such as MRIs or CT scans are analyzed to decide if the patient is a candidate for treatment.

2. Personalized Planning
A specific treatment plan is created for each patient using advanced software that determines the exact radiation dose and beam path.

3. Treatment Sessions

In many cases, a single session is enough. In others, it can be broken down into several short sessions, without the need for hospitalization.

4. Tracking
After treatment, the patient will be monitored through periodic visits and follow-up imaging to assess the progression of the lesion and the overall neurological status.

Frequently Asked Questions about CyberKnife

Does CyberKnife treatment hurt?

 No. The procedure is completely painless and does not require anesthesia.

How many sessions are needed?

It depends on the type, size, and location of the lesion. In some cases, it is treated with a single session; in others, it can be divided into 3 to 5 sessions.

Can it treat difficult or inoperable tumors?

Yes. One of its main advantages is its ability to treat injuries in complex or sensitive areas where traditional surgery poses a high risk.

What side effects can it have?

In general, they are mild and transient. Some fatigue or local discomfort may appear, but they usually do not require additional treatment.

A safe, effective, and non-surgical option

CyberKnife radiosurgery represents one of the major revolutions in the treatment of brain tumors and other intracranial lesions. Its precision, comfort, and safety make it a fundamental tool within the current therapeutic arsenal.

At the Arráez Institute, a pioneering center in the use of cutting-edge technologies applied to neurosurgery, the team led by Dr. Miguel Ángel Arráez offers this treatment with the backing of their extensive experience and a focus entirely centered on patient well-being.

If you or a loved one are looking for an advanced, safe, and minimally invasive option to treat a brain tumor, we invite you to contact us. We will be happy to help you evaluate the best option for each specific case.

Request your appointment or contact us.

We will be delighted to resolve any questions or comments you wish to share with us.