Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 12/8/2025

Management of Adenomyosis with Endometrioma

Diagnosis and Imaging

  • Transvaginal ultrasound is the first-line imaging modality to confirm both adenomyosis and endometrioma, according to the Radiology guidelines 1
  • MRI should be performed to better characterize the extent of adenomyosis and exclude other pathologies when ultrasound findings are inconclusive, as recommended by the Radiology and Praxis Medical Insights guidelines 1, 2
  • Endometriomas typically appear as "ground glass/homogeneous low-level echoes" on ultrasound, as described in the Radiology guidelines 1

Management Algorithm

  • The American College of Radiology recommends a progestin intrauterine device (IUD) for adenomyosis symptoms combined with surgical excision of the endometrioma if it is symptomatic or larger than 5 cm 3, 2
  • First-line medical management for adenomyosis is a Levonorgestrel-releasing intrauterine system (LNG-IUD), which provides significant improvement in pain and bleeding, according to the Journal of the American College of Radiology and Praxis Medical Insights guidelines 3, 2
  • Second-line options for adenomyosis include combined oral contraceptives for symptom control, as recommended by the Journal of the American College of Radiology and Praxis Medical Insights guidelines 3, 2
  • GnRH antagonists are effective for heavy menstrual bleeding, particularly with concomitant adenomyosis, according to the Journal of the American College of Radiology and Praxis Medical Insights guidelines 3, 2

Surgical Management

  • Surgical excision of endometrioma is recommended for lesions ≥5 cm, symptomatic, or with concerning features, with preservation of normal ovarian tissue, as recommended by the Annals of Oncology guidelines 4
  • Fertility-sparing surgery should be performed in reproductive-age women, according to the Annals of Oncology guidelines 4
  • Unilateral salpingo-oophorectomy with preservation of the contralateral ovary and uterus is considered adequate surgical treatment, as recommended by the Annals of Oncology guidelines 4

Refractory Cases

  • Uterine Artery Embolization (UAE) should be considered for women with adenomyosis who fail conservative measures and desire uterus preservation, according to the Journal of the American College of Radiology guidelines 3, 5
  • UAE provides symptom improvement in 94% of patients short-term and 85% long-term, as reported in the Journal of the American College of Radiology guidelines 5, 2
  • Only 7-18% of patients require hysterectomy for persistent symptoms after UAE, according to the Journal of the American College of Radiology and Praxis Medical Insights guidelines 5, 2

Special Considerations

  • Surgical excision of endometrioma should be performed by experienced surgeons to preserve ovarian reserve, as recommended by the Annals of Oncology guidelines 4
  • Abdominal hysterectomy and bilateral salpingo-oophorectomy with careful surgical staging should be considered for postmenopausal women or those with advanced disease, according to the Annals of Oncology and Journal of the American College of Radiology guidelines 4, 5

Monitoring and Follow-up

  • After initiating medical therapy for adenomyosis, follow-up in 3 months to assess symptom improvement, as recommended by the Praxis Medical Insights guidelines 2
  • For endometriomas under surveillance, follow-up ultrasound in 8-12 weeks initially, then annually if stable, according to the Radiology guidelines 1
  • If endometrioma shows enlargement, changing morphology, or developing vascular components, refer to specialist or obtain MRI, as recommended by the Radiology guidelines 1

Pitfalls and Caveats

  • Avoid multiple biopsies of suspected endometriomas as this may reduce ovarian reserve, according to the Annals of Oncology guidelines 4
  • UAE may be less effective when adenomyosis is the predominant condition compared to when fibroids predominate, as reported in the Journal of the American College of Radiology guidelines 5
  • Comprehensive data on fertility and pregnancy outcomes after UAE is lacking; patients should be counseled accordingly, according to the Journal of the American College of Radiology guidelines 5

Adenomyosis Management

Medical Management

  • The American Family Physician recommends high-dose progestins as an effective alternative for adenomyosis treatment 6
  • The American College of Radiology suggests that combined oral contraceptives reduce painful and heavy menstrual bleeding, though less effective than LNG-IUD 7
  • GnRH agonists provide equivalent pain relief to danazol but with better tolerability, according to the American Family Physician 6
  • Add-back therapy must be used with long-term GnRH agonist therapy to prevent bone mineral loss, as stated by the American Family Physician 6
  • Danazol is equally effective to GnRH agonists but has more androgenic side effects, according to the American Family Physician 6
  • GnRH antagonists are highly effective for heavy menstrual bleeding, even with concomitant adenomyosis, as reported by the American College of Radiology 7

Surgical Management

  • The American College of Radiology recommends that the least invasive route should be chosen for hysterectomy, with vaginal or laparoscopic approaches preferred over abdominal hysterectomy 7
  • Vaginal hysterectomy offers shorter operating times and faster return to normal activities, according to the American College of Radiology 7
  • Laparoscopic hysterectomy provides faster recovery, shorter hospital stays, and lower infection rates compared to abdominal approach, as stated by the American College of Radiology 7
  • Hormone replacement therapy with estrogen is not contraindicated following hysterectomy and bilateral salpingo-oophorectomy for adenomyosis, according to the American Family Physician 6

General Considerations

  • No medical therapy has been proven to eradicate adenomyosis lesions, providing only temporary symptom relief, as stated by the American Family Physician 6
  • There is no evidence that medical treatment affects future fertility in women with adenomyosis, according to the American Family Physician 6
  • Surgical recurrence is common, with up to 44% of women experiencing symptom recurrence within one year after conservative surgery, as reported by the American Family Physician 6
  • Comprehensive data on fertility and pregnancy outcomes after UAE is lacking, and patients must be counseled accordingly, according to the American College of Radiology 7

Surgical Management of Adenomyosis

Definitive Surgical Management

  • The American College of Radiology recommends that the least invasive route should be chosen for hysterectomy, with vaginal or laparoscopic approaches preferred over abdominal hysterectomy, offering benefits such as shorter operating times, faster return to normal activities, and better quality of life 8
  • The American College of Radiology suggests that laparoscopic hysterectomy provides faster recovery, shorter hospital stays, and lower infection rates compared to abdominal hysterectomy, and abdominal hysterectomy should be avoided unless anatomical constraints preclude minimally invasive approaches 8
  • The American College of Radiology notes that even with bilateral ovarian conservation, hysterectomy is associated with elevated cardiovascular disease risk, mood disorders, and potentially increased mortality when performed at a young age 8