Rectocele and Enterocele

Rectocele & Enterocele: Definitions & Anatomy - Posterior Prolapse Primer

• Posterior Compartment Prolapse:
  • Rectocele: Herniation of the rectum against the posterior vaginal wall. Caused by defects in the rectovaginal septum.
  • Enterocele: Herniation of the small bowel (Pouch of Douglas) into the upper posterior vaginal fornix. Due to weakness in uterosacral/cardinal ligaments.
• Key Anatomical Supports:
  • Rectovaginal septum (fibromuscular layer)
  • Perineal body (central anchor)
  • Uterosacral & Cardinal ligaments (apical suspension)

⭐ Enteroceles represent a true herniation of the cul-de-sac (Pouch of Douglas), typically containing loops of small bowel.

Rectocele & Enterocele: Etiology & Risk Factors - Why Walls Weaken

• Fundamental Cause: Weakening/damage to endopelvic fascia, levator ani muscles, and perineal body.
• Key Predisposing Factors:
  • Obstetric: Vaginal birth (esp. instrumental, prolonged 2nd stage, macrosomia), multiparity.
  • Pressure: Chronic ↑ intra-abdominal pressure (constipation, cough, obesity, heavy lifting).
  • Hormonal/Age: Menopause (↓estrogen), advancing age (tissue degeneration).
  • Iatrogenic: Prior pelvic surgeries (hysterectomy particularly for enterocele).
  • Constitutional: Genetic predisposition, connective tissue disorders.

⭐ Hysterectomy is a major risk factor for enterocele development by disrupting apical vaginal support.

Rectocele & Enterocele: Clinical Features - Symptoms Unveiled

• Rectocele (Posterior Compartment):
  • Vaginal bulge/mass sensation, often posterior.
  • Defecatory dysfunction:
    • Constipation, straining.
    • Incomplete bowel emptying.
    • Splinting (digital pressure on posterior vagina/perineum to evacuate).
  • Pelvic pressure/heaviness, low back pain.
  • Dyspareunia (occasional).
• Enterocele (Small Bowel Herniation):
  • Vaginal bulge (upper posterior/apical).
  • Pelvic pressure, aching, fullness.
  • Symptoms worsen with prolonged standing/straining.
  • Low back pain.
  • Often coexists with other Pelvic Organ Prolapse (POP); may be asymptomatic.

⭐ Splinting - manually pressing perineum/posterior vaginal wall to aid defecation - is highly specific for rectocele.

Rectocele & Enterocele: Diagnosis & Staging - Seeing & Scoring Sag

• Diagnosis:
  • Clinical Exam: Valsalva maneuver, Sims speculum reveals posterior vaginal bulge.
  • Differentiation:
    • Rectocele: Bulge of rectum into posterior vagina.
    • Enterocele: Herniation of small bowel (peritoneal sac) into upper posterior vagina, often superior to rectocele.
    • Rectovaginal exam: Assesses rectovaginal septum integrity (thinned in rectocele).
• Staging Systems:
  • POP-Q (Pelvic Organ Prolapse Quantification): Standard, objective. Point Bp (most distal point on posterior vaginal wall) is key for rectocele.
    • Stage 0: No prolapse.
    • Stage I: Leading edge >1 cm above hymen (value < -1 cm).
    • Stage II: Leading edge between -1 cm and +1 cm relative to hymen.
    • Stage III: Leading edge >1 cm below hymen, but < (TVL-2) cm. (TVL = Total Vaginal Length)
    • Stage IV: Complete eversion; leading edge ≥ (TVL-2) cm.
  • Baden-Walker System: Simpler, less precise (Grades 0-4).

⭐ Enterocele typically involves the herniation of the small bowel and is often found superior and posterior to a rectocele; it may become more apparent when the patient is standing or straining.

Rectocele & Enterocele: Management - Fixing the Flaw

• Conservative (Mild/Asymptomatic): 📌 Mnemonic: PELT
  • Pessary.
  • Estrogen (topical, if atrophy).
  • Lifestyle: ↑Fiber, fluids, weight control, avoid strain.
  • Training (Pelvic Floor Muscle Training - PFMT).
• Surgical (Symptomatic/Failed Conservative):
  • Goal: Restore anatomy, relieve symptoms.

-   **Rectocele Repair:** Posterior Colporrhaphy (transvaginal fascial plication). Mesh for complex/recurrent.
-   **Enterocele Repair:** Vaginal (McCall culdoplasty, USLS) or Abdominal (Sacrocolpopexy - apical).
> ⭐ McCall culdoplasty, often with vaginal hysterectomy, supports vaginal apex, preventing future enterocele.

High‑Yield Points - ⚡ Biggest Takeaways

• Rectocele: Posterior vaginal wall prolapse from rectovaginal septum defects; presents with constipation, splinting, incomplete evacuation.
• Enterocele: Small bowel herniation into upper posterior vagina, often iatrogenic (post-hysterectomy) or from a deep Pouch of Douglas.
• Enterocele symptoms: vaginal bulge, pelvic pressure, worsening on standing.
• POP-Q system is crucial for objective assessment and staging.
• Management: Conservative (Kegels, pessaries) or surgical repair (posterior colporrhaphy, McCall culdoplasty).
• Multiparity and connective tissue disorders are significant risk factors for both.