Improving Diagnostic Accuracy for Surgical Pelvic Organ Prolapse: A Sequential Protocol Combining POP-Q Examination and Transperineal Ultrasound

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Background/Objectives: The POP-Q system is conventionally used to evaluate pelvic organ prolapse (POP). Nevertheless, differences between clinical examination and intraoperative findings can hinder appropriate surgical planning. We aimed to assess the accuracy of a sequential protocol involving clinical POP-Q assessment and, in cases of uncertain diagnosis, transperineal ultrasound. Methods: We conducted a prospective observational study with 314 women scheduled for POP surgery from January 2021 to December 2024. A pelvic floor specialist assessed all patients using the POP-Q system. Transperineal ultrasound was carried out only when the clinical diagnosis remained uncertain. We compared the accuracy of this sequential approach (POP-Q ± ultrasound) versus POP-Q alone, using intraoperative findings as the gold standard. Sensitivity and specificity were determined for each type of prolapse. Results: Of the 314 patients, 181 (57.6%) had a definitive diagnosis with POP-Q alone, whereas 133 (42.4%) required additional ultrasound. In these uncertain cases, the addition of ultrasound significantly increased sensitivity for cystocele (by 0.5–11.3%), uterine prolapse (45.5–63.7%), cervical elongation (5.2–21.4%), rectocele (5.7–16.4%), and enterocele (58.7–74.7%) (all p < 0.05). Specificity also improved for uterine prolapse, cervical elongation, and rectocele. The sequential protocol’s performance in uncertain cases was comparable to clinical examination in straightforward cases. Conclusions: Applying a sequential protocol that adds transperineal ultrasound for unclear cases significantly increases diagnostic precision for surgical POP, potentially optimizing surgical planning.

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