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Women's Health
Urethral Diverticulum
A urethral diverticulum is an outpouching from the urethra that can fill with urine and cause recurrent infections, post-void dribbling, and pain — specialist surgical reconstruction offers excellent long-term results.
Clinically Reviewed By
Honorary Associate Professor Jeremy Ockrim MD BSc(Hons) FRCS(Urol)
Consultant Urological Surgeon · Reviewed May 2026 · Review due May 2027
What is a Urethral Diverticulum?
A urethral diverticulum is an abnormal outpouching, or pocket, that develops from the wall of the urethra (the tube that carries urine from the bladder to the outside of the body). This pocket connects to the urethra through a small opening, allowing it to fill with urine each time you pass urine. Urethral diverticula typically sit behind the front wall of the vagina, where the pocket lies between the urethra and the vaginal wall.
Although it is an uncommon condition, urethral diverticulum is often missed or misdiagnosed — many women are treated for recurrent urinary tract infections, bladder pain, incontinence or voiding difficulties, or even gynaecological conditions for months or years before the correct diagnosis is made. The symptoms can be vague and overlap with other common conditions, and a urethral diverticulum may not be visible or palpable, or may only be felt as a small swelling on careful vaginal examination.
It is also important to be aware that urethral diverticula have an association with cancer. Chronic infection and inflammation over time can cause transformation of the diverticulum lining, leading to cancer development — urethral cancer is reported in 4–11% of diverticula in published series.
With high-quality MRI imaging and an experienced specialist surgical team, urethral diverticulum can be reliably diagnosed and successfully treated. Our consultant Honorary Associate Professor Jeremy Ockrim has particular expertise in female urethral reconstruction.
Often missed for years
If you have struggled with recurrent UTIs, post-void dribbling, or pain during intercourse despite multiple courses of antibiotics, urethral diverticulum is an important diagnosis to rule out. A specialist examination and pelvic MRI can usually provide answers quickly.
Symptoms of Urethral Diverticulum
Symptoms vary widely between patients and can be vague. The classic teaching is the "3 Ds" triad — dysuria (painful urination), post-void dribbling (after voiding has normally ended), and dyspareunia (painful intercourse) — but only about a quarter of women have all three together. The following features should prompt specialist assessment:
Recurrent Urinary Tract Infections
Stagnant urine trapped within the diverticulum acts as a reservoir for bacteria. Many women have repeated UTIs that respond to antibiotics initially but recur as soon as treatment is stopped.
Dysuria (Painful Urination)
Burning or stinging when passing urine, often without an active infection on urine culture. Pain may be felt specifically over the front wall of the vagina rather than at the urethral opening.
Post-Void Dribbling
Urine continues to leak after you have finished passing urine, as urine trapped in the diverticulum slowly drains back into the urethra. This often causes persistent dampness and is mistaken for stress (cough) incontinence.
Dyspareunia (Pain During Intercourse)
Pressure on the tender diverticulum during sex can cause significant discomfort, particularly with deep penetration. This is often the symptom that prompts women to seek help.
Anterior Vaginal Wall Swelling or Tenderness
A small lump or tender area felt behind the front wall of the vagina. Gentle pressure on the swelling may express urine or pus through the urethra (a diagnostic clue on examination).
Vaginal Discharge
Discharge originating from the diverticulum can be mistaken for a vaginal infection. Discharge that does not respond to standard gynaecological treatment should raise suspicion of a urological cause.
The classic "3 Ds" triad
Dysuria, post-void Dribbling, and Dyspareunia is the traditional triad taught for urethral diverticulum. However, only around 25% of women have all three symptoms together, so a high index of suspicion is needed when any of these features is persistent or unexplained.
Causes of Urethral Diverticulum
The exact cause of a urethral diverticulum is often unknown. Most are thought to be acquired rather than present from birth, and several theories help explain how they develop:
Repeated Infection of the Paraurethral Glands
The most widely accepted theory. Small mucus-producing glands sit alongside the urethra. Repeated infection can cause these glands to enlarge and rupture into the urethra, leaving a pocket that gradually expands into a diverticulum.
Congenital Weakness
In a small number of women, a focal weakness in the urethral wall may be present from birth, predisposing to diverticulum formation later in life.
Trauma from Childbirth or Surgery
Direct injury to the urethra during vaginal delivery, instrumental delivery, or pelvic surgery may weaken the urethral wall and allow a diverticulum to develop.
High-Tone Non-Relaxing Sphincter
An abnormally contracting urethral sphincter can cause pressure to build up behind it during voiding. Over time, this raised pressure may cause the paraurethral glands to rupture, forming a diverticulum.
Iatrogenic Causes
Previous urethral procedures — such as repeated dilatations, catheterisations, urethral injections, or surgery (including mesh placement and removal) — can occasionally lead to diverticulum formation.
How We Diagnose Urethral Diverticulum
Accurate diagnosis requires careful clinical assessment combined with high-quality imaging. Our specialist workup typically includes:
Clinical History & Examination
A focused history and careful vaginal examination, including palpation of the anterior vaginal wall. Gentle pressure on a diverticulum may reveal a tender swelling and express urine or pus through the urethra.
Pelvic MRI (Gold Standard)
A dedicated pelvic MRI with a high-resolution urethral protocol is the most accurate test. It maps the size, shape, location, and configuration of the diverticulum (including any horseshoe or complex configuration) and rules out diverticular tumours.
Video-Urodynamics
Combined pressure-flow studies and video fluoroscopy assess bladder storage, voiding function, and continence — particularly if there are co-existent symptoms of incontinence or voiding difficulty. Fluoroscopy allows visualisation of diverticulum filling and its position in relation to the urethral sphincter muscle.
Cystourethroscopy (Where Indicated)
Cystoscopy is not commonly required. Occasionally a small flexible telescope is used to visualise the diverticular ostium (opening) and to assess the urethra and bladder for other co-existent pathology.
Treatments We Offer at LUS
The right approach depends on the size and complexity of the diverticulum, the severity of your symptoms, and your individual preferences. The following treatments are delivered directly by our specialist surgical team at London Urology Specialists:
Surveillance
Non-SurgicalSmall, asymptomatic diverticula picked up incidentally on imaging can be monitored with interval MRI (although no formal surveillance guidance currently exists). Patients must be aware that diverticula carry a small cancer risk (4–11%), and that annual MRI surveillance may miss cancer development in the interval between scans.
We arrange interval MRI imaging and review symptoms regularly. Any change in symptoms would prompt earlier MRI assessment.
Surgical Excision (Diverticulectomy) with Urethral Reconstruction
Primary TreatmentThe mainstay of treatment for urethral diverticula. The diverticulum sac is dissected free through a transvaginal approach, completely excised, and the urethra is reconstructed in multiple watertight layers. Our specialist surgical team has extensive experience in urethral reconstruction and teaches these techniques internationally. Key principles include:
- ›Complete excision of the diverticulum sac — leaving any residual lining behind risks recurrence
- ›Tension-free, multi-layered urethral closure — preserving urethral length and continence
- ›Non-overlapping suture lines — to reduce the risk of a new urethrovaginal fistula
- ›Catheter drainage — for 3–4 weeks to protect the urethral repair
Martius Fat Pad Interposition
Specialist ReconstructionFor most diverticula, a Martius fat-pad flap is harvested from the labium majus and interposed as a healthy, well-vascularised tissue layer between the urethral repair and the vaginal wall. This brings in a fresh blood supply, separates the suture lines, and significantly reduces the risk of recurrence or fistula formation. Our specialist surgical team has extensive experience in Martius flap reconstruction and teaches the technique internationally.
Excellent Long-Term Outcomes
In experienced hands, success rates for diverticulectomy are typically 85–95%. Symptoms such as recurrent UTIs, post-void dribbling, and dyspareunia usually resolve very quickly once the catheter is removed.
Other Treatments
The following treatments are rarely indicated for urethral diverticulum and are not routinely provided at London Urology Specialists.
Marsupialisation
Rarely UsedA historical procedure in which the diverticulum is opened into the vagina rather than excised. It is now rarely performed because it leaves residual lining (which can recur) and creates an iatrogenic urethrovaginal fistula. The risk of urethral diverticular cancer development also persists. It may very occasionally be considered for patients who are not fit for diverticulum excision.
What to Expect at Surgery
Urethral diverticulectomy is performed under general anaesthetic and typically takes between 1.5 and 3 hours, depending on the complexity of the diverticulum. Most women stay around 48 hours in hospital and are discharged with a catheter to allow healing for 3–4 weeks. A urethrogram dye test is then performed to check for healing before the catheter is removed.
After the operation
A soft urethral catheter remains in place for 3–4 weeks to protect the repair while it heals. You will go home with the catheter and a small drainage bag, and return for a check pericatheter contrast study (urethrogram) and catheter removal.
Recovery & Outcomes
Light activities can usually be resumed within 2 weeks. Heavy lifting, exercise, and sexual activity are generally avoided for at least 8–12 weeks to allow the tissues to heal fully.
The main risk of urethral diverticulectomy is de novo stress incontinence, which occurs in up to 5–20% of cases depending on the size and extent of the diverticulum. Your specialist will discuss your individual risks. In the vast majority of women, incontinence does not occur or is minimal. For those with persistent incontinence, staged incontinence surgery (autologous sling or colposuspension) is successful in over 70–80% of cases.
Long-term outcomes are excellent: in our own and other specialist published series, success rates are typically 85–95%, with very low recurrence rates when meticulous surgical technique and Martius flap interposition (where indicated) are used. Most women experience a marked improvement in their original symptoms — recurrent infections, dribbling, and pain during intercourse — within weeks of catheter removal.
Meet your Specialist
Assessment and treatment of urethral diverticulum is led by our specialist reconstructive urologist Honorary Associate Professor Jeremy Ockrim. Your care will be personally overseen by him from initial consultation through to long-term follow-up.
Key Takeaways
If you have struggled with recurrent urinary tract infections, post-void dribbling, pain on intercourse, or unexplained anterior vaginal wall tenderness, urethral diverticulum is an important diagnosis to consider. With a specialist examination, dedicated pelvic MRI, and surgery delivered by an experienced reconstructive urologist, the great majority of women achieve durable symptom resolution.
Further Reading — Guidance & Patient Information
Frequently Asked Questions About Urethral Diverticulum
The classic triad is the "3 Ds" — dysuria (pain when passing urine), post-void dribbling (urine leaking after you finish urinating), and dyspareunia (pain during intercourse) — although only about a quarter of patients have all three. Other common symptoms include recurrent urinary tract infections, anterior vaginal wall swelling or tenderness, and vaginal discharge. Many women have symptoms for several years before the correct diagnosis is made.
Diagnosis starts with a careful history and a vaginal examination, including palpation of the anterior vaginal wall (which may reveal a tender swelling or expression of pus or urine through the urethra). The gold-standard imaging investigation is a pelvic MRI with a dedicated urethral protocol, which accurately maps the size, location, and configuration of the diverticulum, and video urodynamics if there are co-existent continence concerns.
Urethral diverticulae have an associated risk of cancer in 5–11% and in most cases surgical removal is advocated for most patients. The alternative of MRI surveillance (annually) is unproven and for those that decide on conservative (non surgical) management must be aware of the risks of leaving their diverticulum untreated. The surgical approach depends on your symptoms, the anatomy of the diverticulum, and your own preferences, all of which we will discuss with you in detail.
Most women go home within 1–2 days of surgery. A urethral catheter is typically left in place for 2–3 weeks to allow the urethral repair to heal without tension, and is removed in clinic after a check imaging study (often a cystogram or follow-up MRI at 3 months). Most patients can return to light activities within 2 weeks, and sexual activity is usually deferred for at least 6 weeks. Many women feel a significant improvement in symptoms very quickly after the catheter is removed.
Recurrence is uncommon when surgery is performed by an experienced specialist team using careful technique — published success rates are typically 85–95%. Honorary Associate Professor Jeremy Ockrim has extensively published on his experience of diverticulae surgery and is considered a national expert on their management. The keys to a low recurrence rate are complete excision of the diverticulum sac, a watertight multi-layered urethral closure, and (where appropriate) the use of a Martius fat-pad interposition to provide a healthy, well-vascularised tissue layer between the urethra and the vagina. Larger, complex, or previously operated diverticula carry a slightly higher risk of recurrence and may require more advanced reconstruction.
Concerned About Ongoing Urethral Symptoms?
If you have recurrent urinary infections, persistent discomfort, post-void dribbling, or other unexplained urethral symptoms, we'll carry out a thorough assessment, arrange any necessary investigations, and explain your treatment options clearly.