In the POP-Q (Pelvic Organ Prolapse Quantification) system, a woman has Ba point at +2 cm, C point at 0 cm, and Bp point at -3 cm. How is this classified?

• A Stage III prolapse (most distal point at +2 cm, beyond hymen by 2 cm) ✓
• B Stage II anterior compartment prolapse only
• C Stage IV complete procidentia
• D Stage I prolapse (all points above hymen)

Explanation

POP-Q staging is determined by the most distal (most positive) point: Stage 0 = all points ≤-3 cm; Stage I = most distal point > -3 cm but <-1 cm; Stage II = most distal point between -1 and +1 cm (within 1 cm of hymen); Stage III = most distal point >+1 cm but < total vaginal length minus 2 cm; Stage IV = complete eversion (most distal point ≥ TVL-2 cm). Here Ba = +2 cm is the most distal point, >+1 cm, classifying this as Stage III. C = 0 cm indicates cervical descent, and Bp = -3 cm means the posterior wall is well-supported.

Reference: Shaw's Textbook of Gynaecology, 17th ed.

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Written and medically reviewed by the StethoPrep medical team.