Endometriosis

Endometriosis: Basics - Rogue Tissue Tales

• Definition: Presence of endometrial-like glands & stroma outside the uterine cavity.
• Pathogenesis Theories:
  • Sampson's: Retrograde menstruation (most accepted).
  • Meyer's: Coelomic metaplasia.
  • Halban's: Lymphatic/vascular spread.
  • Immunologic defects; stem cells.
• Risk Factors: Nulliparity, early menarche, late menopause, short menstrual cycles (<27 days), heavy bleeding, family history, Müllerian anomalies, DES exposure.

⭐ Most common site: Ovaries (chocolate cyst/endometrioma).

Endometriosis: Symptoms - The Pain Story

• Classic Triad:
  • Dysmenorrhea: Cyclical, progressive, often starts before menses.
  • Dyspareunia: Deep, especially with uterosacral ligament involvement.
  • Infertility/Subfertility: Affects ~30-50% of women.
• Other Pain Manifestations:
  • Chronic Pelvic Pain (CPP): Non-cyclical, >6 months duration.
  • Dyschezia: Painful defecation, especially during menses (rectovaginal disease).
  • Dysuria: Painful urination, bladder involvement.
• Cyclical symptoms: Pain often worsens during menstruation.
• Less common: Cyclical hematuria or hematochezia.

⭐ The severity of symptoms in endometriosis does not always correlate with the American Society for Reproductive Medicine (ASRM) stage or the visible extent of the disease; minimal disease can cause severe pain.

Endometriosis: Diagnosis - Unmasking the Enemy

• Clinical Suspicion:
  • History: Chronic pelvic pain, dysmenorrhea (progressive), deep dyspareunia, infertility, cyclical symptoms.
  • Exam: Uterosacral nodularity, adnexal tenderness, fixed retroverted uterus.
• Imaging:
  • TVS: First-line; endometriomas ("ground glass" appearance).
  • MRI: For Deep Infiltrating Endometriosis (DIE), complex cases, surgical planning.
• Gold Standard:
  • Laparoscopy: Direct visualization of lesions (powder-burn, clear, red, black).
  • Biopsy & Histopathology: Confirms endometrial glands & stroma.

⭐ Laparoscopy with biopsy is the definitive gold standard for endometriosis diagnosis.

• Staging (rASRM):
  • Revised ASRM: Stage I (minimal) to IV (severe). Based on lesion type, size, location, adhesions.

Endometriosis: Treatment - Calming the Chaos

• Expectant: Mild, asymptomatic.
• Medical (Pain):
  • 1st line: NSAIDs, COCs (continuous).
  • 2nd line: Progestins (Dienogest 2 mg/day), GnRH agonists (w/ add-back), GnRH antagonists (Elagolix).
• Surgical:
  • Conservative (Laparoscopy): Excision/ablation. For pain/fertility.
  • Definitive (TAH+BSO): Severe, completed family, failed other Rx.

⭐ Long-term GnRH agonist use requires "add-back" therapy (estrogen + progestin) to mitigate hypoestrogenic side effects like bone loss.

Endometriosis: Long Haul - Future Focus

• Infertility: Common; due to adhesions, ↓ oocyte quality, altered tubal function.
• Chronic Pelvic Pain (CPP): May persist despite treatment; impacts quality of life.
• Adhesions: Can lead to bowel/bladder dysfunction, ongoing pain.
• Endometrioma: Risk of rupture, torsion; monitor large cysts (>5 cm).
• Malignancy Risk:

  ⭐ Slightly ↑ risk of epithelial ovarian cancer (EOC), especially endometrioid & clear cell types, with ovarian endometriomas.

• Recurrence: Common after medical or surgical therapy; often requires long-term management strategy focusing on symptoms and fertility goals.

High‑Yield Points - ⚡ Biggest Takeaways

• Most common site: Ovary (forming endometriomas or chocolate cysts).
• Classic triad: Cyclic pelvic pain, dysmenorrhea, dyspareunia; often infertility.
• Definitive diagnosis: Laparoscopy with biopsy (presence of endometrial glands & stroma).
• Most accepted etiology: Sampson's theory of retrograde menstruation.
• Characteristic lesions: Powder-burn, mulberry spots, or blue-black puckered lesions.
• Medical management: NSAIDs, OCPs, progestins, GnRH agonists, danazol.
• Slightly ↑ risk of epithelial ovarian cancer (especially endometrioid and clear cell types).