When someone is told that a tumour in the brain may need radiation treatment, the word “radiosurgery” can be confusing. Many people naturally assume that radiosurgery means an operation involving an incision or removal of the tumour.
It does not.
Stereotactic Radiosurgery (SRS) is a highly precise form of external radiation therapy. It uses specialised equipment to position the patient accurately and deliver a focused, high dose of radiation to a specific target. Despite the word “surgery,” there is no conventional surgical incision involved. The technique is commonly used for selected brain tumours and other disorders of the brain and central nervous system.
For patients and families searching for Stereotactic Radiosurgery Therapy in Dwarka, understanding what the treatment actually involves can make a specialist consultation much less intimidating.
Dr Mohit Kadian, Consultant in Radiation Oncology, provides specialist radiation oncology consultation in Dwarka. Patients who have been diagnosed with a brain tumour, brain metastasis or another condition for which stereotactic radiation has been suggested can discuss their reports and treatment options with a radiation oncology specialist.
Stereotactic Radiosurgery, commonly called SRS, is a radiation treatment designed to deliver a highly focused dose to a small, well-defined target.
The National Cancer Institute describes stereotactic radiosurgery as a type of external radiation therapy that uses specialised equipment to position the patient and precisely deliver a single large dose of radiation to a tumour. It is commonly used for brain tumours and certain other brain disorders that cannot be treated safely with regular surgery.
The treatment is based on precision.
Multiple radiation beams can approach the target from different directions. Individually, these beams have relatively little effect on the normal tissues they pass through. At the planned target, however, the beams converge and deliver the prescribed radiation dose.
This allows the radiation oncology team to focus treatment on a small area.
The term “radiosurgery” can make patients think that the treatment involves cutting into the skull.
It does not.
There is no surgical incision in SRS. Instead, radiation is used to damage the DNA of the targeted tumour cells. The treatment may be used when a tumour is small and well defined or when conventional surgery may not be the most appropriate approach.
The name reflects the precision and treatment intent rather than a traditional surgical procedure.
This distinction is worth understanding because patients sometimes delay consultations after assuming that “radiosurgery” means undergoing brain surgery.
SRS is not appropriate for every brain tumour.
It may be considered for selected patients with conditions such as:
The suitability of SRS depends on factors such as the size and location of the lesion, its relationship with important brain structures, previous treatment and the patient's overall health.
For example, NCI's information on adult central nervous system tumours includes stereotactic radiosurgery among treatment options for selected meningiomas, including some smaller tumours.
For brain metastases, SRS is also an established treatment option in selected situations. NCI lists stereotactic radiosurgery among the treatment options for patients with limited numbers of brain metastases.
The important point is that SRS is a treatment technique, not a diagnosis-specific treatment that can be recommended to everyone.
Cancer that begins in another part of the body can sometimes spread to the brain. These secondary brain tumours are known as brain metastases.
Treatment depends on the number, size and location of the lesions, the primary cancer, the extent of cancer elsewhere in the body and the patient's overall condition.
SRS may be used as a focal treatment for selected brain metastases. In some patients, it may be used alone, while in other situations surgery, whole-brain radiation therapy or systemic cancer treatment may also be considered.
This is one reason why a multidisciplinary cancer evaluation can be important.
The radiation oncologist needs to understand the complete cancer history rather than looking at the brain scan in isolation.
Patients sometimes hear about both Stereotactic Radiosurgery and Whole-Brain Radiation Therapy (WBRT) and assume they are interchangeable.
They are not.
SRS is a focused treatment directed at specific targets.
Whole-brain radiation therapy treats a much larger volume of the brain.
The choice between these approaches depends on the patient's disease and clinical circumstances. For selected patients with a limited number of brain metastases, focal treatment such as SRS may be considered. NCI notes that treatment options can include SRS, WBRT, surgery or combinations of these approaches depending on the situation.
A radiation oncologist will consider the number and size of lesions, symptoms, location, previous treatment and other factors before recommending a particular strategy.
The precision of SRS begins well before the actual radiation delivery.
The treatment team may use detailed MRI and CT imaging to identify the exact location of the target. The images are then used during treatment planning to determine the target and the nearby normal structures that need to be protected.
The patient also needs to be positioned very accurately.
Depending on the treatment system and clinical situation, a specialised head immobilisation system may be used. NCI explains that patients undergoing SRS may be placed in a head frame or another device to help prevent movement during treatment.
The radiation oncology team then develops a treatment plan using multiple radiation beams directed from different angles.
The goal is to deliver the prescribed dose precisely to the target.
SRS is traditionally associated with a single treatment session, and NCI describes it as usually being given in one dose.
However, treatment schedules can vary.
In some situations, stereotactic treatment may be divided into several doses, sometimes called fractionated stereotactic radiosurgery or fractionated stereotactic radiotherapy. NCI notes that some patients may receive up to five doses, depending on the treatment situation.
The number of sessions should therefore never be assumed from the term “radiosurgery.”
Your radiation oncologist will determine the appropriate schedule based on the size and location of the lesion, nearby sensitive structures and other clinical considerations.
Before treatment, the radiation oncology team needs a clear understanding of the patient's diagnosis.
Depending on the situation, this may involve reviewing:
MRI is particularly important in many brain tumour evaluations because it provides detailed information about the brain and the location of the lesion.
The radiation oncologist then determines whether stereotactic treatment is technically and clinically appropriate.
SRS is highly precise, but precision has limits.
The treatment is generally most useful when the target can be clearly identified and safely separated from critical normal structures.
A tumour located close to an important part of the brain may require a very different treatment approach from a similarly sized tumour located elsewhere.
Size also matters.
For example, NCI's discussion of meningioma treatment identifies SRS as an option for selected tumours smaller than 3 cm, while larger or differently located tumours may require other approaches.
This does not mean that 3 cm is a universal cutoff for every SRS treatment. Different diseases and clinical circumstances have different criteria.
The radiation delivery itself is generally not felt.
The patient lies in position while the treatment machine delivers the planned radiation.
The positioning and immobilisation process can sometimes feel unusual, particularly for someone who has never undergone radiation treatment before.
Some patients may experience side effects following SRS. These depend on the part of the brain treated, the size and location of the target, the dose and individual factors.
Possible effects can include fatigue, headache, nausea or swelling around the treated area. More specific risks need to be discussed with the treating radiation oncologist because the potential side effects vary considerably between patients.
For an appropriate patient, stereotactic radiosurgery can offer several practical and clinical advantages.
The treatment is designed to concentrate radiation on a defined target rather than treating the entire brain.
Although it is called radiosurgery, SRS does not involve the surgical removal of the tumour.
Some SRS treatments are completed in a single session, although certain patients require multiple stereotactic treatments.
SRS may be considered when a tumour is difficult to reach surgically or when conventional surgery presents substantial risks.
However, these advantages do not mean SRS is automatically better than surgery or other radiation techniques. The right treatment depends on the individual patient.
Like every cancer treatment, SRS has potential risks.
Radiation can affect normal tissues close to the treatment target. Depending on the location and dose, patients may experience temporary or longer-term side effects.
One recognised complication after stereotactic radiation is radiation necrosis, in which treated brain tissue undergoes radiation-related damage. Not every patient develops this complication, and the risk varies according to several factors.
Patients should ask specifically about:
Understanding these risks before treatment is an important part of informed decision-making.
Cancer treatment is rarely about choosing one treatment in isolation.
A patient with a brain metastasis may require treatment for the original cancer as well as the brain lesion. A patient with a meningioma may need surgery, observation or radiation depending on the circumstances.
Similarly, a patient with a brain tumour may require surgery for diagnosis or decompression before radiation is considered.
NCI's treatment information for central nervous system tumours demonstrates that management can involve surgery, radiation therapy, systemic treatment or combinations depending on the diagnosis.
This is why a detailed specialist assessment is important.
For patients searching for Stereotactic Radiosurgery Therapy in Dwarka, location can make a practical difference.
Cancer treatment often involves several appointments, imaging studies, treatment planning and follow-up visits. Having specialist oncology care in the Dwarka area can make repeated visits more manageable for patients and their families.
Patients may seek care from areas including:
Venkateshwar Hospital is located on Sector 12 Road in the Sector 18/18A area of Dwarka, New Delhi.
For patients considering stereotactic radiation, Dr Mohit Kadian can help assess the role of radiation therapy as part of an individual's cancer treatment plan.
A brain tumour diagnosis can make it difficult to remember everything discussed during an appointment.
It can help to write down your questions beforehand.
Consider asking:
A good consultation should leave the patient with a realistic understanding of the proposed treatment rather than simply the reassurance that the technology is “advanced.”
Stereotactic Radiosurgery is a highly precise form of external radiation therapy that delivers a focused, high dose of radiation to a specific target, particularly in the brain. Despite its name, it does not involve a surgical incision.
No. SRS is a radiation treatment. There is no conventional cutting or tumour removal during the radiosurgery procedure.
Some patients receive a single treatment, while others may receive several stereotactic treatments. NCI notes that treatment may sometimes involve up to five doses.
Yes. SRS is one of the treatment options for selected patients with brain metastases, depending on factors such as the number, size and location of the lesions and the patient's overall cancer status.
SRS may be an option for selected meningiomas. Treatment depends on factors including tumour size, location, symptoms and previous treatment. NCI lists SRS among treatment options for selected smaller meningiomas.
The radiation itself is not normally felt. However, patients may experience side effects after treatment, depending on the treatment area and individual circumstances.
Not necessarily. SRS and surgery have different roles. The appropriate choice depends on the tumour type, size, location, symptoms, overall health and other clinical factors.
They are closely related stereotactic radiation techniques, but the terminology generally differs according to the treatment site. SRS is primarily associated with precisely targeted radiation to the brain and central nervous system, while SBRT refers to stereotactic radiation for tumours elsewhere in the body.
Searching for Stereotactic Radiosurgery Therapy in Dwarka is a good starting point, but the most important step is determining whether SRS is actually appropriate for the individual patient.
A precise radiation technique can be valuable when the tumour characteristics and surrounding anatomy make it suitable. At the same time, surgery, conventional radiation, systemic therapy, observation or a combination of treatments may be more appropriate in other situations.
The decision should therefore be based on the diagnosis, imaging, tumour characteristics, previous treatment and the patient's overall health—not simply on the availability of an advanced treatment.
Dr Mohit Kadian, Consultant in Radiation Oncology, can help patients and families understand the role of radiation therapy and whether a stereotactic approach may be appropriate for their individual cancer care.
If you have been advised to consider SRS, carry your MRI/CT scans, pathology reports, previous treatment records and medication details to your consultation. Having the complete medical history available allows the radiation oncology team to make a more informed treatment recommendation.
