Can endometriosis be present with normal ultrasound and MRI?

Yes, endometriosis can be present even when ultrasound and MRI are read as normal, and adenomyosis can sometimes be missed too. Scans are best at spotting ovarian endometriomas and some deep disease, but superficial implants, small lesions, or disease in harder-to-see areas can go undetected while still irritating nerves and surrounding tissues and causing severe symptoms.

A normal scan can be reassuring about some problems, but accuracy depends on the imaging protocol and the reader’s experience, so imaging is not a simple yes-or-no test. CT can also miss endometriosis and other pain drivers, and a routine X-ray is not a useful test for detecting endometriosis.

In our evaluation, we give considerable weight to a careful exam and your full history, including cyclical pelvic pain, painful sex, infertility, flare timing, pain triggers, bleeding patterns, bowel and bladder symptoms, and changes over time. We also consider conditions that can mimic, coexist with, or amplify endometriosis symptoms, including adenomyosis, pelvic floor dysfunction, pelvic venous congestion and other vascular causes, hernias, thyroid disorders or PCOS with overlapping symptoms, gut dysbiosis, nervous system sensitization, and other drivers of inflammation.

We use imaging as supportive information to estimate disease likelihood, map suspected disease, and plan safe surgery when appropriate, rather than dismiss symptoms because a scan looks normal. If symptoms persist despite normal imaging, you can schedule a consultation with our team to review your history and scans in context and discuss a clear plan toward diagnosis and relief, including whether surgical evaluation is appropriate.