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This study identified frequent occurrences of imprecise nomenclature that resulted in mismanagement of a few potentially viable angular pregnancies. It is imperative for clinicians and sonologists to use unambiguous nomenclature and avoid the term 'cornual pregnancy' altogether.

Objectives: Ovarian cancer mortality remains high mainly due to late diagnosis. Since 1999, we have performed colour Doppler transvaginal (CDTV) ultrasound to screen for ovarian cancer. The purpose of this paper is to assess the efficiency of CDTV ultrasound to detect ovarian cancer in early stages. Methods: Screening by CDTV ultrasound was annually performed in asymptomatic women with no family history of ovarian cancer. Women with abnormal screenings had repeat tests after four to six weeks. If the finding remitted, CDTV ultrasound follow-up was performed at one year. If the abnormality persisted, the study was completed with tumour markers, CT scan, and laparoscopy. Results: A total of 606,770 CDTV ultrasound screenings performed in 153.403 women were reviewed. Malignant tumours were diagnosed and histologically confirmed in 107 patients. Borderline lesions were detected in 46 of them (44,2%). The mean age of the patients was 47 years (±±12). 76 (73%) of these tumours were in stage I (including two cases of Fallopian tube carcinoma); seven were in stage II; 21 were in stage III; and three lesions detected were metastases. 61 percent of the patients had normal levels of CA 125, measured after the lesions were detected by CDTV ultrasound study. Conclusions: Although consensus about the benefits of transvaginal ultrasound as a screening procedure is not unanimous, our data suggest that tumours in patients screened with CDTV ultrasound are detected at earlier stages. Additional randomised studies are needed to support these findings. OC03.04 An external validation of the O-RADS risk stratification to differentiate between benign and malignant adnexal masses

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Oral communication abstractsspecificity of 98% (95% CI, 96-93%), an LR+ of 63.8 and an LRof 0.09. Conclusions:This technique shows, in a large population, a high specificity and sensitivity in the detection of parametrial endometriosis.This study was partly supported by Fondazione di Sardegna grant F74I19001010007.