What Are the Different Grades of a Cystocele?

A cystocele, commonly called a “dropped bladder” or anterior vaginal wall prolapse, is graded on a scale from mild to severe based on how far the bladder has descended into or beyond the vaginal canal. Two grading systems are widely used in clinical practice: the older Baden-Walker system, which assigns grades 1 through 4, and the more standardized Pelvic Organ Prolapse Quantification (POP-Q) system, which assigns stages 0 through IV. The grades roughly correspond to one another, but the way they measure prolapse differs, and the grade alone does not always predict how much trouble a cystocele causes in daily life.

Two Grading Systems, One Question

Most doctors use one of two systems to describe how far a cystocele has dropped. The Baden-Walker system is the simpler of the two: it asks how far the most descended point of the bladder sits relative to the hymenal ring (the vaginal opening). Grade 1 means the bladder has dropped about halfway toward the opening but has not reached it. Grade 2 means it has reached the opening. Grade 3 means it has pushed past the opening by roughly half its remaining distance. Grade 4 means the entire anterior vaginal wall has turned inside out and is hanging outside the body. Because the system relies on visual estimation rather than precise measurements, two examiners can sometimes assign different grades to the same patient.

The POP-Q system was developed to fix that inconsistency. Instead of eyeballing the prolapse, the examiner takes centimeter measurements of several points on the vaginal wall relative to the hymenal remnant. Stage 0 means no prolapse at all. Stage I means the most descended point is more than a centimeter above the hymen. Stage II means it sits within one centimeter of the hymen in either direction. Stage III means it has descended more than a centimeter past the hymen but is not a complete eversion of the vaginal wall. Stage IV is complete eversion, where the vaginal wall has essentially flipped entirely outward.¹ The POP-Q system has been endorsed by major professional societies and is the standard in research settings because its measurements are reproducible and can be tracked over time.²

In everyday clinical conversation, though, many providers still use the Baden-Walker language because it is faster. If your doctor tells you that you have a “grade 2 cystocele,” they almost certainly mean the bladder has descended to or near the vaginal opening. If they say “stage II,” they are using POP-Q and mean roughly the same thing, but with more precise measurements behind it.

What Each Grade Looks and Feels Like

Grade 1 (or Stage I) is the mildest form. The bladder has slipped slightly from its normal position, but it has not reached the vaginal opening. Many people with a grade 1 cystocele have no symptoms at all and only learn about it during a routine pelvic exam. When symptoms do appear at this stage, they tend to be subtle: a vague sense of pelvic pressure or mild difficulty emptying the bladder completely.

Grade 2 (or Stage II) is the point where the bladder reaches the vaginal opening. You may feel a noticeable bulge, especially after standing for long periods or during physical activity. Urinary symptoms become more common here: stress incontinence (leaking with coughing, sneezing, or lifting), a feeling that the bladder doesn’t fully empty, or needing to urinate frequently. Some people describe a sensation of “sitting on something” by the end of the day.

Grade 3 (or Stage III) means the bladder protrudes past the vaginal opening. At this stage, the bulge is usually visible and palpable without straining. Urinary symptoms tend to worsen, and some people develop the opposite problem from what they expect: instead of leaking urine, the prolapse kinks the urethra and makes it hard to urinate at all. This is called obstructive voiding, and it can lead to urinary retention where you cannot empty your bladder without manually pushing the prolapse back (a maneuver that doctors call “splinting”).

Grade 4 (or Stage IV) is a complete prolapse, where the entire anterior vaginal wall has everted. This is relatively uncommon and almost always symptomatic. Walking, sitting, and sexual activity can all become difficult. The exposed vaginal tissue may dry out, chafe, and occasionally ulcerate. Urinary function is usually significantly disrupted.

Why Grade Does Not Always Match Symptoms

One of the most frustrating aspects of cystocele grading is that the anatomical grade does not line up neatly with how much discomfort a person experiences. A large study examining symptoms in women with pelvic organ prolapse found that symptom severity was only weakly to moderately correlated with the degree of descent, and that symptoms did not necessarily correspond to the specific compartment where the prolapse was worst.³ In practical terms, this means someone with a stage II cystocele can feel more bothered than someone with a stage III, and a person with a large cystocele may have no urinary leakage at all while someone with a smaller one leaks every time they cough.

Part of the explanation is that a cystocele does not exist in isolation. The bladder, uterus, and rectum share the same pelvic support system, and weakness in one area often affects the others. A person with a moderate cystocele might also have some degree of uterine descent or rectal prolapse, and the combined effect of all three can be more disruptive than the cystocele grade alone would suggest. Additionally, the specific type of tissue defect matters, as discussed below.

Midline Versus Lateral Defects

Not all cystoceles are structurally the same. Surgeons distinguish between midline defects and lateral (paravaginal) defects based on where the supportive tissue has given way. The bladder is held in place partly by a sheet of connective tissue that runs along the front vaginal wall. If that tissue stretches or tears in the center, the bladder herniates straight down through the middle, producing a midline cystocele. If it tears at the sides where it attaches to the pelvic sidewall, the bladder drops laterally, producing a paravaginal defect.⁴ Many people have a combination of both.

The distinction matters because it affects surgical planning. A midline defect is typically repaired by reinforcing the central tissue (a procedure called anterior colporrhaphy), while a lateral defect requires reattaching the tissue to the pelvic sidewall (paravaginal repair).⁵ When both types coexist, some surgeons address them simultaneously using a combination technique.⁶ The grading system does not capture this distinction on its own: a stage III cystocele could be a midline defect, a lateral defect, or both. That is why imaging and careful physical examination are often needed in addition to a simple grade assignment.

What Pushes a Cystocele From One Grade to the Next

Vaginal childbirth is the single largest modifiable risk factor for pelvic organ prolapse, and cystoceles in particular. During delivery, the pelvic floor muscles have to stretch to more than three times their resting length. Imaging studies show that this overstretching can tear the levator ani, the main muscle group supporting the pelvic organs, in up to about one in five first-time mothers. That injury shows up later in life in over half of women who develop prolapse, with roughly seven times the odds of prolapse compared to women whose muscles remained intact.⁷

But childbirth is only part of the story. Aging and the drop in estrogen after menopause weaken the connective tissue and muscles over time. Chronic straining from constipation, heavy lifting, or a persistent cough can accelerate descent. Obesity increases intra-abdominal pressure on the pelvic floor. A family history of prolapse also raises risk, suggesting a genetic component in how strong or elastic your connective tissue is. Research has confirmed that the area of the levator ani muscle during straining is significantly associated with cystocele severity, linking muscle damage directly to grade progression.⁸

Progression from one grade to the next is not guaranteed, though. Some cystoceles remain stable for years. A grade 1 detected in your 40s may never get worse, especially if you maintain pelvic floor strength and manage chronic straining. Others progress steadily, particularly if the underlying muscle damage is severe or if multiple risk factors stack on top of each other.

Managing Lower-Grade Cystoceles Without Surgery

For grade 1 and many grade 2 cystoceles, surgery is rarely the first step. The most common non-surgical approaches include pelvic floor muscle training (often called Kegel exercises when done consistently and correctly) and pessaries, which are silicone devices inserted into the vagina to physically support the bladder from below.

Pessaries are more versatile than many people realize. Studies report successful fitting in roughly 40 to 74 percent of patients, and even among people with advanced stage III or IV prolapse, about 62 percent can be successfully fitted.⁹ For people with urinary retention caused by a cystocele kinking the urethra, a pessary can be particularly helpful: in one study, a pessary relieved retention in three-quarters of patients with anterior wall prolapse.¹⁰

The main reasons pessary fitting fails are a short vaginal canal, a wide vaginal opening, prior pelvic surgery, or coexisting stress incontinence. Among those who are successfully fitted, long-term adherence is reasonable: one study found that the likelihood of continued pessary use was about 83 percent at one year, dropping to roughly 62 percent at five years, with most discontinuations being due to the patient choosing surgery rather than the pessary failing mechanically.¹¹ Being able to remove and reinsert the pessary yourself was the strongest predictor of sticking with it beyond three years.

Topical estrogen is often prescribed alongside a pessary to keep the vaginal tissue healthy and reduce irritation. Lifestyle modifications like weight management, treating chronic coughs, and avoiding constipation help slow or prevent further descent.

When Surgery Enters the Picture

Surgery is typically reserved for people whose symptoms significantly affect their quality of life and who have not gotten enough relief from non-surgical approaches, or who prefer a definitive repair. The threshold is usually around stage II or higher with bothersome symptoms, but there is no universal cutoff. A person with a stage II cystocele who is miserable deserves the same surgical consideration as someone with stage III.

The most traditional procedure is anterior colporrhaphy, which tightens and reinforces the weakened tissue along the front vaginal wall. It has been performed for well over a century and remains the most commonly done repair.⁵ Transvaginal mesh was introduced to improve the durability of repairs, and a randomized trial of nearly 400 women found that at one year, roughly 61 percent of mesh recipients met the composite success criteria compared to about 35 percent of those who had colporrhaphy alone.¹² However, the mesh group also had longer surgeries, more intraoperative bleeding, and a higher rate of complications. Concerns over mesh-related adverse events, including erosion through the vaginal wall and chronic pain, led the U.S. FDA to halt the sale of transvaginal mesh kits for prolapse repair in 2019. Mesh is still used in some abdominal (sacrocolpopexy) approaches, which have a different complication profile.

One issue that catches patients off guard is “occult” or hidden stress urinary incontinence. A large cystocele can actually mask incontinence by kinking the urethra shut. When the prolapse is repaired and the kink is removed, leaking may suddenly appear. Research using urodynamic testing with and without prolapse reduction has shown that reducing a large prolapse during testing reveals hidden incontinence in a significant proportion of patients, and this information helps surgeons decide whether to add an anti-incontinence procedure at the same time as the prolapse repair.¹³

Sexual Function After Cystocele Repair

Sexual outcomes after cystocele surgery are a common concern, and the evidence is genuinely mixed. In one study, women who underwent anterior colporrhaphy experienced decreased orgasm intensity and increased pain during intercourse after the procedure, even though desire and arousal remained unchanged.¹⁴ On the other hand, a separate prospective trial involving vaginal mesh implantation found that both pelvic floor quality of life and sexual function improved after surgery, with dyspareunia (painful intercourse) becoming less common at follow-up.¹⁵

These results are not as contradictory as they appear. The type of repair, the severity of the original prolapse, the surgeon’s technique, and whether mesh is involved all influence sexual outcomes. Some degree of vaginal narrowing or scarring is inherent in any tissue-tightening procedure, and this can change sensation. The takeaway is that sexual function should be discussed explicitly with your surgeon beforehand. If sexual activity is important to you, that information can influence the choice of technique.

Recurrence Rates and What Drives Them

One of the less-discussed realities of cystocele repair is that recurrence is common. A meta-analysis pooling data from 29 studies and over 6,500 patients found an overall recurrence rate of about 38 percent after pelvic organ prolapse surgery.¹⁶ That figure includes all types of prolapse, not just cystoceles, but the anterior compartment is consistently cited as the most likely to recur.

The strongest risk factors for recurrence are levator muscle avulsion (a tear in the main pelvic floor muscle, carrying about 2.5 times the odds of recurrence), having a preoperative stage of III or higher (about 1.9 times the odds), a wider pelvic hiatus on straining, and a history of prior pelvic floor surgery.¹⁶ A separate two-year follow-up study focused specifically on cystocele recurrence and confirmed many of the same risks. It found that complete avulsion of the puborectalis muscle, advanced preoperative stage, and a family history of prolapse all independently predicted anatomical recurrence after anterior wall repair.¹⁷

Recurrence on imaging or exam does not always mean symptoms return, though. A surgeon may detect anatomical descent at a follow-up visit that the patient has not noticed. Whether a recurrence needs treatment depends entirely on whether it is causing problems. Many recurrences remain at a low grade and stay asymptomatic indefinitely.

Grading Across Pelvic Compartments

The grading systems described above are not specific to cystoceles. The same POP-Q stages and Baden-Walker grades apply to all forms of pelvic organ prolapse: rectoceles (back wall), uterine or vaginal vault descent (top), and enteroceles (small bowel herniating into the vaginal space). Because prolapse frequently involves more than one compartment, a complete assessment usually notes the grade in each area separately. You might hear something like “stage II anterior, stage I posterior,” meaning a moderate cystocele with a mild rectocele.

This multi-compartment picture matters for treatment decisions. Repairing only the cystocele while ignoring a concurrent uterine descent can leave you dissatisfied with the result, or the unreparied area may worsen under the new mechanical forces created by the repair. In studies of recurrence, sacrospinous fixation (a procedure that anchors the vaginal apex to a pelvic ligament) was itself associated with higher odds of cystocele recurrence, possibly because redirecting the vaginal axis places new stress on the anterior wall.¹⁷ This highlights how interconnected the different compartments are and why comprehensive evaluation matters more than the grade in any single compartment.

1
Mayo Clinic Proceedings. Evaluation and Management of Pelvic Organ Prolapse
2
PubMed Central. Pelvic Organ Prolapse Quantification System (POP-Q) – a new era in pelvic prolapse staging
3
American Journal of Obstetrics & Gynecology. Symptoms of pelvic floor dysfunction in women with pelvic organ prolapse
4
PubMed Central. Paravaginal defect: anatomy, clinical findings, and imaging
5
PubMed Central. Anterior Colporrhaphy and Paravaginal Repair for Anterior Compartment Prolapse: A Review
6
PubMed. Transvaginal paravaginal repair of high-grade cystocele central and lateral defects with concomitant suburethral sling
7
PubMed Central. Pelvic floor injury during vaginal birth is life-altering and preventable: what can we do about it?
8
Indonesian Journal of Obstetrics and Gynecology. The Degree of Cystocele and Rectocele with Hiatal Area Levator Ani
9
PubMed Central. Pessary Use in Pelvic Organ Prolapse and Urinary Incontinence
10
PubMed. Pessary reduction and postoperative cure of retention in women with anterior vaginal wall prolapse
11
PubMed. Vaginal ring pessary use for pelvic organ prolapse: continuation rates and predictors of continued use
12
PubMed. Anterior colporrhaphy versus transvaginal mesh for pelvic-organ prolapse
13
Urology. Comparison of Abdominal Leak Point Pressures in Patients With Large Cystocele and Severe Vaginal Vault Prolapse
14
PubMed. Sexual dysfunction in patients after cystocele surgery. Is the g-spot a myth or reality?
15
PubMed. Improvement of pelvic floor-related quality of life and sexual function after vaginal mesh implantation for cystocele
16
PubMed. Risk factors for the recurrence of pelvic organ prolapse: a meta-analysis
17
PubMed Central. Avulsion of puborectalis muscle and other risk factors for cystocele recurrence: a 2-year follow-up study