Most bladder cysts are benign and treatable, but the right approach depends entirely on what type of cyst you have and whether it’s causing symptoms. Some cysts resolve with medication alone, while others need to be surgically removed and examined under a microscope to rule out cancer. Fewer than 1% of bladder masses turn out to be cancerous, but because the bladder is a common site for tumors, any growth found there gets taken seriously.
What Bladder Cysts Actually Are
A cyst in the bladder is a fluid-filled sac that forms on or within the bladder wall. The most common type is called cystitis cystica, which develops when the bladder lining becomes chronically irritated, often from repeated urinary tract infections. These cysts are small, filled with fluid, and generally harmless on their own. They’re an inflammatory response, not a growth gone wrong.
Other types include urachal cysts, which form from a leftover structure that connected your bladder to your umbilical cord before birth. These sit at the top of the bladder and can become infected. Less commonly, a cyst-like growth may turn out to be a papilloma (a benign tumor) or, rarely, an early-stage bladder cancer that happens to look cystic on imaging. That’s why getting a clear diagnosis matters before deciding on treatment.
How Bladder Cysts Are Diagnosed
If you’re having symptoms like blood in your urine, pelvic pain, or frequent urination, your doctor will typically start with imaging. Ultrasound can detect larger cysts, but CT urography provides a more detailed picture. In studies comparing CT urography against direct visual inspection, CT had a sensitivity of 79% and specificity of 94% for detecting bladder abnormalities. That means it catches most problems but can miss subtle ones.
Cystoscopy is the gold standard. A thin camera is passed through the urethra into the bladder, giving your doctor a direct look at the cyst’s size, shape, and surface texture. Focal thickening that looks nodular or irregular raises concern for malignancy, while smooth, diffuse thickening almost never does. If anything looks suspicious during cystoscopy, your doctor will take a tissue sample (biopsy) at the same time.
Treating Inflammatory Cysts
When bladder cysts are caused by chronic inflammation or recurrent infections, the first priority is clearing the underlying infection and preventing new ones. For straightforward urinary tract infections, oral antibiotics typically resolve the issue within a few days. Your doctor will choose the antibiotic based on what bacteria are involved and local resistance patterns in your area.
Once the cycle of infection and irritation is broken, inflammatory cysts like cystitis cystica often shrink or disappear on their own. If you’ve been dealing with recurring UTIs, your doctor may investigate what’s causing them, whether that’s incomplete bladder emptying, kidney stones, or another structural issue. Treating the root cause is what keeps the cysts from coming back.
Surgical Removal With TURBT
For cysts that are large, symptomatic, or need to be biopsied, the standard procedure is transurethral resection of a bladder tumor, commonly called TURBT. Despite the name including “tumor,” this same technique is used for any bladder growth that needs to come out, including cysts.
The procedure is done under general or spinal anesthesia. Your surgeon inserts a thin scope through the urethra (no external incisions) and uses a small cutting loop to remove the cyst along with a margin of surrounding tissue. In some cases, a special dye is released into the bladder about an hour before surgery, then illuminated with a specific wavelength of light to help the surgeon see exactly where abnormal tissue begins and ends. The removed tissue is sent to a pathologist to determine whether it’s benign or something more concerning.
Most people go home the same day or the next morning. You’ll likely have a catheter in place for a day or two afterward to let the bladder heal. Mild burning during urination and some blood in the urine are normal for the first week or so. Most people return to normal activities within one to two weeks, though your doctor may recommend avoiding heavy lifting for a bit longer.
When a Cyst Turns Out to Be Something Else
The reason doctors treat bladder cysts with a degree of caution is that bladder cancer can sometimes mimic a cyst on imaging. While fewer than 1% of bladder masses are cancerous, the consequences of missing one are significant. If your biopsy comes back showing cancerous cells, treatment depends on whether the cancer has grown into the muscle layer of the bladder wall.
For superficial (non-muscle-invasive) growths, TURBT alone may be sufficient, sometimes followed by a medication placed directly into the bladder to reduce the chance of recurrence. For deeper cancers, more extensive treatment is needed, potentially including partial or full removal of the bladder. This is a major surgery with a hospital stay of five to seven days for open procedures and a recovery period of about six weeks before you can return to driving, work, and normal physical activity.
Follow-Up After Treatment
Even after a benign cyst is removed, follow-up cystoscopy is important. The first check happens at three months after removal, and it’s considered one of the strongest predictors of whether a growth will come back. What happens after that depends on the pathology results.
For low-risk findings, you’ll have a cystoscopy at three months, then again at 12 months, then once a year for a total of five years. For intermediate-risk findings, the schedule tightens to every six months for the first two years, then annually for up to 10 years. High-risk results call for cystoscopy every three months for two years, then every six months through year five, then annually for life, along with yearly CT imaging of the upper urinary tract.
These schedules may sound intensive, but cystoscopy is a quick outpatient procedure, usually taking just a few minutes. The goal is to catch any recurrence early, when it’s easiest to treat. If your cyst was purely inflammatory and your biopsy showed no abnormal cells, your follow-up schedule will be much lighter, often just periodic imaging or a single repeat cystoscopy to confirm the cyst hasn’t returned.
Urachal Cysts
Urachal cysts are a special case. Because they sit outside the bladder lining in a remnant structure at the top of the bladder, they’re treated differently. Small, asymptomatic urachal cysts may simply be monitored. If one becomes infected, you’ll need antibiotics first to calm the infection, followed by surgical removal once the inflammation settles. The surgery typically involves removing the cyst along with the urachal remnant, and it can often be done laparoscopically through small incisions in the abdomen. Recovery is similar to other minimally invasive abdominal surgeries: a few days of discomfort and a return to full activity within two to four weeks.