Final answer:
A 67-year-old woman underwent vaginal surgical repair for a cystocele, which is the prolapse of the bladder into the vagina, by plicating the pubocervical fascia.
Step-by-step explanation:
The defect repaired in the 67-year-old G3P3 woman with severe pelvic protrusion status post hysterectomy was a cystocele. Cystocele refers to the prolapse of the bladder into the vagina, which can happen when the supportive tissue between a woman's bladder and vaginal wall weakens and stretches. Since the surgery described involved plicating the pubocervical fascia in the midline as well as laterally to the arcus tendineus fascia, this indicates that the anterior vaginal wall, which supports the bladder, was the focus of the repair. Hence, A. Cystocele is the correct answer to the question about which defect was repaired in the patient.