Ultrasound vs. histologic findings in 40 patients with special types of ectopic pregnancy.

PURPOSE: The purpose of the study was to analyze the ultrasound findings and imaging features of patients with special types of ectopic pregnancy. METHODS: The ultrasound findings of 40 patients with special types of ectopic pregnancy in our hospital were retrospectively analyzed. RESULTS: Among 40 patients, there were 17 cases of corneal pregnancy, 12 cases of cervical pregnancy, 8 cases of uterine scar pregnancy, and 3 cases of incomplete abortion confirmed by operation and pathology. The accuracy rate of ultrasound findings in the diagnosis of 40 special types of ectopic pregnancy was 77.50%, with a consistency rate of 70.59% for cornual pregnancy, 83.33% for cervical pregnancy, 100.00% for cesarean scar pregnancy and 33.33% for incomplete abortion. There were 9 misdiagnoses in ultrasound diagnosis, including 5 misdiagnoses of angular pregnancy (misdiagnosed as 4 cases of tubal interstitial pregnancy and 1 case of trophoblastic tumor), 2 misdiagnoses of cervical pregnancy (misdiagnosed as incomplete abortion), and 2 misdiagnoses of incomplete abortion (misdiagnosed as isthmus pregnancy). There was no misdiagnosed case of cesarean scar pregnancy. CONCLUSION: Ultrasound findings have some value in the diagnosis of specific types of ectopic pregnancy and can help identify different types of ectopic pregnancy. Transabdominal ultrasound and transvaginal ultrasound should be clinically combined to obtain more information for diagnosis.