system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why isn't there a non-invasive/non-surgical test for diagnosing endometriosis? What's wrong with ultrasounds, MRIs, pelvic exams, etc?
gpt
Ultrasounds can't detect small endometrial growths. Pelvic exams can detect bumps, but can't confirm that they are caused by endometriosis. MRI is pretty good, but it isn't as good as just using a camera (laparoscope) to find lesions, or biopsy if the lesions are too small to be visible.