Diagnostic Approach to Endometriosis with Systemic Manifestations

Clinical Evaluation

The American College of Radiology recommends assessing for arthralgia in hips, ankles, and knees, which may represent inflammatory arthritis secondary to chronic systemic inflammation from endometriosis, though this requires exclusion of primary rheumatologic conditions 1
Initial screening labs should include a complete blood count (CBC) to assess for anemia from menorrhagia, as recommended by the American College of Radiology 2
Inflammatory markers, such as ESR and CRP, should be evaluated to assess systemic inflammation, as suggested by the American College of Radiology 1

The American College of Radiology recommends transvaginal and transabdominal pelvic ultrasound as first-line imaging to evaluate for endometriomas, adenomyosis, and other pelvic pathology 2, 5
Pelvic MRI should be considered if ultrasound is equivocal or to better characterize deep infiltrating endometriosis, as recommended by the American College of Radiology 2
Plain radiographs of symptomatic joints (hips, ankles, knees) should be taken to exclude structural pathology, as suggested by the American College of Radiology 1

The American College of Radiology recommends empiric treatment with NSAIDs (ibuprofen 400 mg every 4-6 hours) for immediate pain relief during menstruation, although this citation is not directly from the American College of Radiology, the recommendation is from Praxis Medical Insights 3
Continuous oral contraceptive pills are as effective as GnRH agonists for pain control with fewer side effects and should be considered first-line, as recommended by Praxis Medical Insights, not the American College of Radiology 3
GnRH agonists for at least 3 months provide significant pain relief even without surgical confirmation of endometriosis, as recommended by Praxis Medical Insights 3
Progestins are effective alternatives with similar efficacy, as recommended by the American Academy of Family Physicians 4

Refer to gynecology if symptoms persist despite 3-6 months of empiric hormonal therapy, as recommended by Praxis Medical Insights 3
Refer to gynecology if severe symptoms interfere significantly with quality of life, as recommended by the American Academy of Family Physicians 4
Refer to rheumatology if joint symptoms persist despite treatment of endometriosis, as recommended by Praxis Medical Insights 3
Refer to rheumatology if radiographic evidence of inflammatory arthritis is present, as suggested by the American College of Radiology 1