OP03.06: Ultrasonographic features and analysis of primary tubal carcinoma

To analyse the sonographic features of primary fallopian tube carcinoma (PFTC), and the reasons for missed diagnosis or misdiagnosis, and improve the accuracy of preoperative diagnosis of PFTC. Clinical data and ultrasonographic imaging feature of 13 patients with pathologically confirmed PFTC were retrospectively analysed from January 2017 to January 2022 in our Hospital. Seven cases were correctly diagnosed by preoperative ultrasonography, while five were misdiagnosed and one was missed diagnosed. The patients were classified according to ultrasound sonogram: Type I (1 case), no abnormal ultrasonographic changes in the adnexal area. Type II (2 cases), the cystic adnexal mass with papillary projections, CDFI showed abundant blood flow inside the projections. Type III (5 cases), the sausage-shaped complex adnexal mass showed clear boundary, the cystic area that lined along the fallopian tube was around or at the side of the solid part, CDFI showed abundant blood flow inside the solid part. Type IV (2 cases), the sausage-shaped hypoechoic adnexal mass showed clear boundary, CDFI showed abundant blood flow signal inside the mass. Type V (3 cases), the adnexal irregular hypoechoic adnexal masses with predominant solid components, single or multiple. CDFI showed rich blood flow inside the tumour. Among 13 cases, one of the Type I was missed in preoperative ultrasonography. The diagnostic accuracies were 100% in Type II, 80% in Type III, and 50% in Type IV respectively by preoperative ultrasonography. In Type V, the misdiagnosis rate was 100%. The diagnostic accuracies of preoperative ultrasonography are different in different types of PFTC. Although it tends to be missed or misdiagnosis when the lesion is small or in advanced stage in type I and V, typical ultrasonography imaging of PFTC has certain characteristics which is of great value for preoperative diagnosis. Combining medical history with ultrasonography imaging can offer more details for the diagnosis of PFTC.