Endometrioma (Palliative Investigational Adjunct)

Palliative investigational adjunct for endometrioma-related chronic pelvic pain in patients declining or unable to undergo surgical/hormonal management.

Tier C — InvestigationalИсследовательское применениеLast updated: 2026-05-26 · Reviewed by ASH Editorial Board

Краткая информация для пациента

Есть ли FDA-допуск для этого показания?: Not FDA-cleared for endometrioma. FDA cleared medicinal leeches only for venous congestion in microsurgical reconstruction (K040187, 2004). Use here is Tier C investigational and palliative-only, with no disease-modifying mechanism.
Какие доказательства существуют?: Tier C (investigational). No controlled trials exist for hirudotherapy in endometrioma. Endometriomas are ovarian endometriotic cysts, a subtype of endometriosis, typically discovered on pelvic imaging. Evidence-based management includes hormonal suppression (combined oral contraceptives, progestins, GnRH agonists/antagonists, dienogest), laparoscopic cystectomy with biopsy (preferred over drainage for diagnosis and recurrence reduction), and addressing concurrent endometriosis. Premenopausal women considering surgery require AMH (anti-Mullerian hormone) assessment and discussion of impact on ovarian reserve.
Основные риски: Bleeding from bite sites for 6 to 24 hours after detachment
Bruising and tenderness over the lower abdomen for 5 to 10 days
Local skin infection or Aeromonas infection
Allergic reaction to leech saliva
Cannot reach or affect the deep ovarian cyst from topical placement
Delay of hormonal suppression or laparoscopic cystectomy, both of which are evidence-based
Missed malignant transformation (rare but reported in endometriomas)
Missed infertility evaluation if pregnancy is desired
Кому не следует это рассматривать: Pregnant patients
Patients with suspected malignant transformation
Patients with acute endometrioma rupture or torsion (surgical emergency)
Patients in active infertility evaluation considering surgery
Patients within 12 weeks of abdominal or pelvic surgery
Patients on anticoagulants or with severe anemia
О чём спросить врача: Has endometrioma been confirmed by ultrasound or MRI, with malignancy concern addressed?
Have I been offered hormonal suppression (combined OC, progestins, dienogest, GnRH agonist/antagonist)?
Have I been offered laparoscopic cystectomy, and what does AMH testing show about my ovarian reserve?
If I want to preserve fertility, have I been referred to reproductive endocrinology?
Where exactly will the leech be placed, and why is the abdominal wall expected to help a deep ovarian cyst?
Has it been clearly explained that this is palliative-only, not disease-modifying?
Когда срочно обратиться за медицинской помощью: Sudden severe one-sided abdominal or pelvic pain (rule out rupture or torsion)
Heavy or unusual vaginal bleeding
Fever above 38.0 C / 100.4 F or chills
Persistent vomiting or signs of acute abdomen
Bleeding from a bite site lasting more than 24 hours
Spreading redness, warmth, or pus at any bite site

Что это НЕ означает

It does not shrink or treat endometriomas — the ovarian cyst is anatomically deep and inaccessible.
It does not replace hormonal suppression or laparoscopic cystectomy, both of which have evidence support.
It does not address infertility or improve fertility outcomes.
It is palliative only and only when standard therapy is declined or unavailable.

Перекрёстные ссылки безопасности

Clinical Profile

Category: gynecologic
ICD-10: N80.1, N80.10
Safety tier: medium

Evidence Summary

Endometriomas are ovarian endometriotic cysts, a subtype of endometriosis, typically discovered on pelvic imaging. Evidence-based management includes hormonal suppression (combined oral contraceptives, progestins, GnRH agonists/antagonists, dienogest), laparoscopic cystectomy with biopsy (preserved over drainage for diagnosis and recurrence reduction), and addressing concurrent endometriosis. Premenopausal women considering surgery require AMH assessment and discussion of ovarian reserve impact. No published controlled trials of hirudotherapy exist for endometrioma. Lower abdominal placement is purely symptomatic-palliative, with no plausible disease-modifying mechanism; the deep pelvic location is inaccessible to topical agents.

Treatment specifics

How many leeches, where they are placed, how long a session lasts, and whether to repeat are clinical decisions made by a qualified provider under institutional protocol — not something to self-administer. Discuss the specifics with a clinician experienced in medicinal leech therapy. (Clinicians: switch the audience selector in the top bar to “Clinician” to view protocol detail.)

Contraindications

Active anticoagulant therapy (warfarin INR >2.0, DOACs, heparin)
Hemophilia or other bleeding disorder
Severe anemia (Hb <10 g/dL)
Active bacteremia or sepsis
Known hypersensitivity to leech salivary proteins
Pregnancy (relative — first/third trimester)
Immunocompromised state with severe neutropenia
Pregnancy
Suspected malignant transformation (rare but reported)
Acute endometrioma rupture or torsion
Concurrent infertility evaluation actively considering surgery
Recent abdominal surgery

Related Conditions

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Endometriosis-Related Pelvic Pain

Investigational adjunctive use for chronic endometriosis-related pelvic pain; very limited evidence. Not a substitute for hormonal or surgical management.

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Investigational use for primary dysmenorrhea refractory to NSAIDs and hormonal contraception; small case series.

Chronic Pelvic Pain Syndrome (Non-Specific)

Investigational use for non-specific chronic pelvic pain syndrome; case-series evidence for symptom reduction within multimodal management.