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Radiation cystitis is a well-recognized complication of pelvic radiotherapy that causes bloody urination. Several patients come to my urology office with hematuria following a history of pelvic radiation. This symptom often becomes a chronic issue that significantly impacts quality of life.

• Urologiezentrum Bangkok Krankenhaus Thailand Online buchen 02-310-3009 bhquro@bdms.co.th
• Krankenhaus Samitivej Sriracha Chonburi 088-022-1445

Pelvic radiotherapy is a common treatment for prostate cancer, cervical cancer, and colorectal cancer. While the beam is aimed at cancer cells, it is impossible to completely spare surrounding organs. The urinary bladder sits within the pelvis and is susceptible to long-term radiation-induced damage.

Radiation cystitis is reported in approximately 5% of patients with a history of pelvic radiotherapy. Bleeding does not occur immediately after completing radiotherapy — it requires time for radiation to cause chronic bladder inflammation. There are two common time windows when radiation cystitis tends to appear:

• Within 3–6 months after pelvic radiation
• After 6 months post-radiation — most commonly appearing around 10 years after radiotherapy completion

Radiation cystitis treatment plan — 2 phases

1. Aktive Blutungsphase
   • Bladder irrigation for massive bleeding
   • Identify and treat correctable causes such as urinary tract infection
   • Hospitalization when needed for patient stabilization
   • Endoscopic hemostasis if bleeding persists despite conservative measures

2. Stabile Phase
   • Hyperbaric oxygen therapy — Radiation cystitis results from chronic bladder inflammation due to tissue hypoxia. Placing the patient in a hyperbaric oxygen chamber increases bladder tissue oxygenation, promoting healing and resolving chronic hematuria. Up to 96% success rate at 6-month follow-up.
   • Oral medication (Pentosan polysulphate) — Creates a protective extra layer on the bladder surface, reducing urothelial exposure to urine. Onset of effect is 1–8 weeks.
   • Intravesical therapy — Formalin instillation shows a 60–90% response rate but carries risk of acute kidney injury and respiratory failure. Hyaluronic acid is a safer alternative that enhances connective tissue healing, with up to 92% response rate reported.
   • Urinary diversion — Reserved only for patients who fail all other treatment modalities. A neobladder is created and connected to the abdominal wall (stoma).

The key message for patients is that radiation cystitis is a chronic condition that requires step-by-step management and patience with the clinical outcome. Early specialist evaluation leads to better treatment results.

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Frequently Asked Questions About Radiation Cystitis

What is radiation cystitis and who gets it?

Radiation cystitis is chronic inflammation of the urinary bladder caused by pelvic radiotherapy — most commonly following treatment for prostate cancer, cervical cancer, or colorectal cancer. It affects approximately 5% of patients who undergo pelvic radiation. The bladder is susceptible because it sits within the radiation field targeting adjacent organs. Symptoms, particularly bloody urination, may appear within 3–6 months or as late as 10 years after completing radiotherapy.

What is the most effective treatment for radiation cystitis?

Hyperbaric oxygen therapy is the most effective treatment for stable-phase radiation cystitis, achieving up to 96% success rate at 6-month follow-up. It works by increasing bladder tissue oxygenation to reverse the hypoxic injury caused by radiation. Other options include oral Pentosan polysulphate (onset 1–8 weeks), intravesical Hyaluronic acid instillation (up to 92% response rate), and intravesical Formalin (60–90% response but higher risk). Urinary diversion is reserved for refractory cases.

What should I do if I develop bloody urine after pelvic radiation?

Any episode of bloody urination (hematuria) following pelvic radiotherapy should be evaluated by a urologist promptly. The initial management focuses on ruling out other causes (such as urinary tract infection), controlling active bleeding through bladder irrigation or endoscopic hemostasis if needed, and stabilizing the patient. Once the active bleeding is controlled, a tailored long-term treatment plan is formulated based on severity and response to therapy. Do not ignore hematuria after pelvic radiation — early evaluation leads to better outcomes.

If you have developed bloody urination after pelvic radiation therapy, Dr. Soarawee Weerasopone offers specialist consultations at Bangkok Hospital Headquarters. Beratungstermin buchen.

**Haftungsausschluss:** Dieser Inhalt wurde von Dr. Soarawee Weerasopone, einem Facharzt für Urologie am Bangkok Hospital Headquarters, verfasst und überprüft. Er dient ausschließlich Bildungszwecken und stellt keine medizinische Beratung dar. Konsultieren Sie immer einen qualifizierten Mediziner, bevor Sie eine medizinische Behandlung beginnen.