Q47
Single choice
A76 year old White female presents to her family practitioner complaining of vaginal pressure, dyspareunia, urinary incontinence, and difficulty emptying her bladder for the past 4 weeks. Seven years ago she had a prolapsed "bladder tacking" procedure. Her postvoid residual urine in the office measures 250 mL. The most notable finding on pelvic examination is seen in Figure .
What is the most likely etiology of her urinary retention?