Endometriosis Diagnosis and Management

Key Diagnostic Features

The clinical presentation of endometriosis is characterized by progressive worsening of menstrual pain over time, pain timing extending beyond menstruation, and associated infertility, which is typical of secondary dysmenorrhea from endometriosis 1, 2
Approximately 50% of patients with endometriosis present with infertility, and the condition affects at least one-third of women with infertility 2, 3

Primary dysmenorrhea is excluded because it does not progressively worsen over years and is not associated with infertility, and pain is confined to the menstrual period 1
Chronic pelvic inflammatory disease is less likely because it typically presents with acute or subacute symptoms rather than progressive worsening over 2 years, and the specific pattern of pain related to menstrual timing is not characteristic of chronic PID 4
Adenomyosis is possible but less likely because it typically affects older reproductive-aged women and is more common in multiparous women, and while it can cause progressive dysmenorrhea, the combination with infertility and the specific pain timing pattern is more characteristic of endometriosis 2

The American College of Radiology confirms that endometriosis diagnosis is fundamentally clinical and does not require surgical confirmation before initiating empiric treatment, and laparoscopy with histologic confirmation is no longer required before starting therapy 2
Transvaginal ultrasound with expanded protocol is the recommended first-line imaging modality, with sensitivity of 82.5% and specificity of 84.6% for detecting endometriosis, and MRI pelvis should be considered if ultrasound is inconclusive or for surgical planning 2
First-line treatments include hormonal medications such as combined oral contraceptives and progestin-only options, and medical treatment is generally effective for pain management 1

The American College of Radiology advises that routine imaging (ultrasound or MRI) is not indicated for suspected endometriosis in postmenopausal women because the disease is estrogen‑dependent and typically regresses after menopause; persistent symptoms in this population are more likely due to scarring or reactivation from postmenopausal hormonal therapy. 5