title: Ectopic pregnancy: criteria and accuracy of ultrasonic diagnosis.
abstract: Of 26 ectopic pregnancies, a correct positive ultrasonic diagnosis was made in 77%, while a false negative diagnosis was made in 23%. Most commonly, the ectopic pregnancy appeared as a complex adnexal mass immediately adjacent to an enlarged "empty" uterus. Ultrasonic identification of an extrauterine gestational sac, allowing a definitive diagnosis of ectopic pregnancy, was uncommon.
mesh_terms: D003951:Diagnostic Errors; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis*; D011274:Pregnancy, Tubal / Q000175:diagnosis; D014463:Ultrasonography