Introduction: Female pelvic organ prolapse (POP) is considered a borderline disease between urology and gynecology and is treated by reconstructive surgery, which restores the organs to their original positions.
Case Presentation: An 82-year-old woman with bladder and uterine prolapse at POP-Q Stage IV was treated with an indwelling catheter for voiding dysfunction. Eventually, the catheter has been often spontaneously removed when pelvic organ prolapse occurs, resulting in a diagnosis of bladder inversion.