Vesicovaginal and Ureterovaginal Fistula Clinical Presentation

Updated: Dec 18, 2018
  • Author: Sandip P Vasavada, MD; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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Presentation

History

Suspect a possible fistula when a patient reports acute onset of urinary incontinence after a recent gynecologic surgery (eg, hysterectomy or cesarean delivery), if the degree of incontinence is disproportional to the physical findings, or if the medical history and the nature of incontinence are inconsistent.

The clinical history of vesicovaginal or ureterovaginal fistula is usually straightforward. Typically, a gynecologic procedure, such as hysterectomy, is involved. Often, the operation is reported to have been technically challenging. Poor intraoperative exposure, coupled with heavy bleeding at the operative site, are often risk factors. Associated bladder injury may have occurred and may have been repaired.

Patients with vesicovaginal fistula often report painless unremitting urinary incontinence. This is also called total, or continuous, incontinence requiring the use of several thick pads per day. The urinary incontinence mimics stress incontinence, in which urine loss is more dramatic during physical activities or when the individual stands upright from a lying position. Symptoms of urinary frequency and urgency are typically absent. Patients may notice a clear vaginal discharge

Acute onset of vesicovaginal fistula immediately after pelvic surgery does not cause constitutional symptoms. If the Foley catheter is still in place, the first sign of impending fistula formation is the presence of hematuria.

Conversely, patients with ureterovaginal fistula may experience constitutional symptoms of fever, chills, malaise, flank pain, and gastrointestinal symptoms in association with continuous urinary incontinence. Constitutional symptoms may result from hydronephrosis secondary to ureteral obstruction or urinary extravasation into the retroperitoneal space. Acute-onset ureterovaginal fistulas are often associated with a difficult postoperative course. These patients present with fever, ileus, and abdominal and flank pain.

Approximately 10-15% of fistulas do not appear for 10-30 days. Some fistulas may not manifest for months. Radiation-induced fistulas may not become apparent for many years after radiation treatment. The development of a typical radiation-induced fistula is heralded by radiation cystitis, hematuria, and bladder contracture. These symptoms are improved dramatically by the sudden presence of vesicovaginal fistula.

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Physical Examination

During a physical examination, patients with newly onset ureterovaginal fistulas may demonstrate flank or abdominal tenderness due to hydronephrosis and/or urinary extravasation into the retroperitoneal space. Patients with vesicovaginal fistulas do not present with abdominal or flank symptoms.

A detailed pelvic examination reveals clear fluid pooling at the apex of the vagina. On close inspection, a pinpoint opening at the vaginal apex is often visualized in mature fistulas. When a fistula has not yet matured (immature fistula), inflamed erythematous vaginal mucosa is visible, with granulation tissue surrounding the fistulous tract. The fistulous opening is often difficult to localize in immature fistulas. In addition, pelvic examination may be tolerated poorly by the patient, further complicating the examination. In these situations, pelvic examination under general anesthesia is warranted.

Vaginal view of vesicovaginal fistula. Vaginal view of vesicovaginal fistula.
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