VHOSPITAL.CLINIC · Differential Diagnosis
Endometriosis vs Uterine Fibroids
Clinical comparison — shared symptoms, key differences, distinguishing diagnostic tests, treatment pathways, and when to seek urgent evaluation.
Condition Overview
Condition A
Endometriosis
Endometriosis is a condition where tissue similar to the uterine lining grows outside the uterus. It causes chronic pelvic pain, especially during menstruation, and can lead to infertility. It affects approximately 10% of reproductive-age women.
Condition B
Uterine Fibroids
Uterine fibroids are benign smooth muscle tumors of the uterus, causing heavy menstrual bleeding, pelvic pressure, and urinary symptoms. They affect up to 70% of women by age 50; treatment ranges from watchful waiting to medication or surgical removal.
Shared Symptoms — Why They're Confused
Both conditions present with 1 overlapping symptom, making clinical differentiation essential.
Key Clinical Differences
Endometriosis
- Cyclical menstrual pain and pelvic pressure
- Dyspareunia, dysmenorrhoea, dyschezia
- Ultrasound: endometriomas (chocolate cysts)
- Confirmed by laparoscopy
Uterine Fibroids
- Irregular or heavy periods (menorrhagia) from uterine distortion
- Pelvic pressure, urinary frequency, constipation
- Uterus enlarged and irregular on examination
- Ultrasound: intramural, subserosal, or submucosal fibroids
Distinguishing Diagnostic Tests
| Test | Endometriosis | Uterine Fibroids |
|---|---|---|
| Pelvic ultrasound | Ovarian endometrioma: homogeneous 'ground glass' cyst | Uterine fibroids: well-defined hypoechoic solid masses in myometrium |
| Nature of pain | Cyclical, worsening with menstruation; dyspareunia | Pressure symptoms, menorrhagia; pain less cyclical in pure fibroids |
| CA-125 | Mildly elevated (endometriosis-related inflammation) | Normal — fibroids do not elevate CA-125 |
Treatment Approaches
Endometriosis
- •Hormonal therapy (combined OCP, GnRH agonists)
- •Laparoscopic excision or ablation
Uterine Fibroids
- •Uterine artery embolisation (UAE)
- •Myomectomy (fertility-preserving)
- •Hysterectomy for definitive treatment
When Doctors Consider Each Diagnosis
🔵 Consider Endometriosis when:
- →Cyclical pelvic pain, dyspareunia, ovarian chocolate cysts, mildly elevated CA-125
🟢 Consider Uterine Fibroids when:
- →Heavy periods, uterine enlargement, fibroid on USS, pressure symptoms, normal CA-125
Explore Each Condition in Detail
Related Clinical Pages
Endometriosis
Medical References
Content on this page is informed by evidence-based clinical sources including:
- World Health Organization (WHO)Global health guidance and disease classification
- National Health Service (NHS)UK clinical guidelines and patient information
- National Institute for Health and Care Excellence (NICE)Evidence-based clinical practice guidelines
- Centers for Disease Control and Prevention (CDC)US public health data and clinical recommendations
- PubMed – NCBIPeer-reviewed biomedical literature and clinical studies
- Cochrane LibrarySystematic reviews and meta-analyses in evidence-based medicine
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