Cystocele Diagnosis and Imaging

Clinical Presentation and Diagnosis

Patients with cystocele may present with a sensation of vaginal bulging or protrusion, as reported by the American College of Radiology 1
Clinical examination is the cornerstone of diagnosis, with imaging reserved for cases where clinical evaluation is difficult or inadequate, according to the American College of Radiology 1

Voiding Cystourethrography (VCUG) focuses on the anterior compartment, defines cystocele as extension of the opacified urinary bladder below the pubic symphysis, and can measure urethral angle relative to vertical axis, as described by the American College of Radiology 2 and 3
MR Defecography provides comprehensive anatomic and functional evaluation of the entire pelvic floor, can detect levator muscle defects, and shows good agreement with physical examination for anterior compartment prolapse, as reported by the American College of Radiology 2 and 4
Transperineal Ultrasound (TPUS) is a non-invasive technique for anatomic and functional evaluation, can detect levator muscle avulsion, and shows significant correlation with physical examination, particularly in the anterior compartment, according to the American College of Radiology 5 and 6

The American College of Radiology recommends transperineal ultrasound (TPUS) as the preferred first-line imaging for anterior compartment (bladder) prolapse, as it is non-invasive and less expensive, and shows significant correlation with physical examination 7, 8
TPUS can detect levator muscle avulsion, which predicts prolapse recurrence, and is performed during rest, strain, and Kegel maneuvers 7, 8
MR defecography provides comprehensive multicompartment evaluation, with 85% agreement with physical examination for anterior compartment prolapse, and is best for detecting associated pelvic floor abnormalities in multiple compartments 9, 10, 11, 12
Voiding cystourethrography (VCUG) has limited utility, focusing only on anterior compartment (bladder and urethra), and is rarely used for initial evaluation due to narrow focus and lower detection rates compared to MR defecography 11, 13

The American College of Radiology recommends physical examination as the cornerstone of diagnosis, with imaging reserved for specific situations, such as when clinical evaluation is difficult or inadequate, symptoms persist despite treatment, multicompartment involvement is suspected, or surgical planning requires detailed anatomic assessment 14, 15

Fluoroscopy Cystocolpoproctography (CCP) allows physiologic upright positioning during defecation, has a sensitivity of 96% for detecting cystoceles, but requires contrast installation in bladder, vagina, and oral contrast, and involves radiation exposure 15, 16, 17, 18
Voiding Cystourethrography (VCUG) focuses only on the anterior compartment, has lower detection rates compared to MR defecography, and does not provide global pelvic floor assessment 17

The American College of Radiology suggests that clinical examination is adequate for most straightforward cases, and imaging should only be ordered when necessary 14, 15

The American College of Radiology recommends querying symptoms such as sensation of vaginal bulging or protrusion, pelvic pressure, urinary incontinence, difficulty emptying the bladder, frequent urination, urgency, incomplete voiding, or need for splinting/digital maneuvers to void in patients with suspected bladder prolapse 19
Associated abnormalities need characterization in atypical or complex cases, and the American College of Radiology suggests considering imaging in these scenarios 19

The American College of Radiology recommends transperineal ultrasound as the preferred first-line imaging for anterior compartment (bladder) prolapse, with advantages including non-invasive, less expensive, and real-time dynamic functional assessment 19
Transperineal ultrasound has a 59.6% prediction rate for anterior compartment prolapse, and can detect levator muscle avulsion, which predicts prolapse recurrence 19
MR defecography provides the most complete anatomic and functional evaluation when multicompartment involvement is suspected or comprehensive pelvic floor assessment is needed, with 85% agreement with physical examination for anterior compartment prolapse 20
MR defecography is optimal for surgical planning when multiple compartments are involved, and can detect levator muscle defects and provide multiplanar imaging with high soft-tissue resolution 20