Ultrasound evaluation of gynecologic causes of pelvic pain.

Ultrasound should be considered the first-line imaging modality of choice in women presenting with acute or chronic pelvic pain of suspected gynecologic or obstetric origin because many, if not most, gynecologic/obstetric causes of pelvic pain are easily diagnosed on ultrasound examination. Since the clinical presentation of gynecologic causes of pelvic pain overlaps with gastrointestinal and genitourinary pathology, referral to CT or MRI, especially in pregnant patients, should be considered if the US examination is nondiagnostic.