A Patient’s Guide to Interstitial Brachytherapy for Cervical Cancer

Brachytherapy is a specialised form of radiation therapy used to treat cervical cancer.

Whether you are a patient or a caregiver, the prospect of brachytherapy may feel overwhelming at first — but with the right information and support, the treatment journey can feel more manageable.

To help navigate this phase, Porunai Hospitals — a leading multispeciality hospital in Tirunelveli — provides clear, practical guidance and delivers advanced treatment.

This guide walks you through the entire interstitial brachytherapy process step by step — from preparation to recovery. Let’s begin by demystifying why interstitial brachytherapy is chosen for cervical cancer.

Why Interstitial Brachytherapy is Ideal for Cervical Cancer

There are two main types of brachytherapy used to treat cervical cancer:

• Intracavitary Brachytherapy
• Interstitial Brachytherapy

Given that, interstitial brachytherapy is often preferred for cervical cancer treatment. But before we see why this approach is chosen, let’s first understand what interstitial brachytherapy is in cervical cancer.

Interstitial brachytherapy for cervical cancer is a targeted, more specialised radiation therapy where radioactive sources are placed directly into or around the tumour tissue using needles or catheters — allowing high-dose radiation to destroy cancer cells.

Now comes the reason why this specific approach is chosen for your cervical cancer treatment.

This method is often selected if:

• The tumour is particularly large or has an irregular shape.
• The cancer involves difficult-to-reach areas — like the lower vagina — where standard applicators may not fit correctly or reach effectively.

In these complex situations, interstitial brachytherapy offers a key advantage.

• It allows your healthcare team to deliver a higher, more concentrated dose of radiation precisely to the tumour.

This precision is crucial because it helps spare the healthy tissues surrounding the cervix from unnecessary radiation. Specifically, organs like the bladder and rectum, which are very close to the treatment area, are better protected during this targeted procedure.

Typically, this specialised brachytherapy is part of a comprehensive treatment plan and is often administered after a course of external beam radiation therapy. Understanding how this treatment is carefully planned is the next important step in your journey.

Preparing for Your Hospital Stay and Applicator Placement

Your journey begins with careful treatment planning before you even arrive at the hospital. This planning phase includes initial imaging — such as MRI or CT scans — to map the tumour’s size and location.

• These detailed images allow your healthcare team to create a customised treatment plan that targets the tumour precisely while protecting surrounding healthy tissue.

Therefore, for your preparation to be thorough, you and your caregiver must actively participate.

• Discuss your complete medical history with your healthcare team, including details about alcohol use, smoking, or sleep apnoea — this information is crucial for your safety during anaesthesia.
• In addition, your caregiver can provide practical support by packing comfortable clothing and personal items to make your hospital stay more manageable.

The next stage is the applicator placement procedure itself. This is where you move into the operating room of the hospital.

• You will receive either general anaesthesia or an epidural with sedation to ensure you are comfortable and feel no pain.
• Once you are comfortable, the procedure begins. A Foley catheter is placed to manage urine during the process.
• The doctor then places the applicator, which holds thin, flexible catheters. Think of these catheters as small, straw-like tubes that are gently guided into the tumour area.
  • The team might use different imaging methods for guidance — depending on your specific case.
  • During this process, advanced imaging is used in real-time to ensure each catheter is positioned with accuracy for precision.

Only when all catheters are positioned will a final MRI or CT scan be conducted to confirm their placement. This final scan helps your healthcare provider complete the treatment planning — ensuring every detail is perfect for the next phase.

With the applicator now securely in place and the plan finalised, you are ready for the next phase of your treatment during your hospital stay.

Also Read: Interventional Radiology for Blood Cancer: Procedure, Management & Treatment

What to Expect During Your Brachytherapy Treatment in Hospital

Your hospital stay begins with a period of strict bed rest, which is necessary while the applicator is in place.

• You will need to lie still on your back to ensure the applicator remains stable and in the correct position — though you can still wiggle your toes for comfort.

Treatment often happens once or twice a day for a few days. Each session is brief — lasting about 10 to 20 minutes.

• For your treatment, you will be taken to a special room where the radiation therapy team connects the catheters from your applicator to the brachytherapy machine.
• During the session, a radioactive source moves from the machine through the catheters for a short period.
• Once your treatment is done, the radioactive source moves back into the machine.
  • The source is removed between the sessions; hence, you are not radioactive, and you can still have visitors.

While you are on bed rest, the hospital team provides comprehensive supportive care to keep you comfortable and safe.

This includes:

• A low-residue diet — to help minimise bowel movements, keeping the applicator stable
• Placing compression boots on your lower legs — to prevent the risk of blood clots while on bed rest
• Deep breathing exercises using an incentive spirometer — to prevent the risk of pneumonia

Any pain / discomfort is managed with a “patient-controlled analgesia” (PCA) pump, which allows you to control your pain effectively. And throughout your stay, a nurse will be nearby, and your care team can see, hear, and talk to you at all times through a monitor.

Once your final treatment session is complete, the team will prepare for the next step in your journey — the removal of the applicator.

Navigating Your Recovery After Interstitial Brachytherapy

After your final treatment session, you will be given medication to help you feel relaxed and sleepy before the medical team removes the equipment.

• The applicator, catheters, Foley catheter, and any other equipment will then be carefully taken out by your care team.

Once you are home, you may experience some “temporary” side effects that will diminish over a few weeks:

• Vaginal discharge; you can use a sanitary pad — but not tampons — to help manage this

Cramping — much like menstrual cramps — for about 24 hours after treatment

• Diarrhoea
• Feeling very tired

A key aspect of your long-term recovery involves managing a condition called “vaginal stenosis” — the vagina may become dry, narrower, and less elastic.

• To prevent this, your care team will provide you with a vaginal dilator and instructions on how to use it.

Using the dilator will help keep your vaginal tissue flexible, which makes future pelvic exams more comfortable and can also make intercourse more pleasant. It is also very important to understand that you will need to use the dilator long-term — as advised by your healthcare team — to maintain vaginal flexibility.

To ensure a smooth recovery, you will need to follow certain activity restrictions for the first six weeks:

• Do not lift anything heavier than 10 pounds (4.5 kilograms).
• Do not take a bath / swim in a pool.
• Do not put anything inside your vagina (such as tampons) / have vaginal intercourse.

It is also vital to call your healthcare provider if you experience any of the following:

• A fever — your care team will tell you the exact temperature to watch for
• Pain that is not helped by your prescribed medication
• Very heavy bleeding (more than a menstrual period) / a foul-smelling discharge
• Cloudy / foul-smelling urine
• No bowel movement for more than three days

Following these steps carefully during your home recovery is a vital part of your journey towards healing.

Moving Forward Confidently After Your Treatment

Interstitial brachytherapy for cervical cancer delivers effective radiation therapy — playing a massive role in targeted care for complex cases.

Remember, the patient and caregiver are vital partners in the healing process — working alongside the healthcare team to support this comprehensive treatment approach.

Navigating this journey for you or your loved ones? At Porunai Hospitals, Tirunelveli, our expert oncology team provides precise diagnosis and tailored treatment plans. Connect with us today for a comprehensive consultation!