MRI findings and clinical characteristics of adnexal torsion in pregnancy / 中国医学影像技术

ABSTRACT

Objective:To explore MRI findings and clinical characteristics of adnexal torsion (AT) in pregnancy. Methods: Clinical and MRI data of 14 patients in pregnancy with pathologically confirmed AT were retrospectively analyzed. Results: There were 2 cases of primary AT and 12 cases of secondary AT (5 with ovarian cyst, 4 with ovarian teratoma, 2 with hydrosalpinx and 1 with tubal mesothelial cyst). AT occurred on the right side in 5 cases and on the left in 9 cases, with torsion angles ranged from 180° to 1 720°. MRI showed that except for 3 cases of solitary AT, ovarian enlargement occurred in 11 cases. Mass in pelvic or abdominal cavity was found in 12 cases, including 8 cystic masses and 4 cystic solid masses. The torsional pedicle next to the masses presented typical "beak sign" in 6 cases, while 1 case showed whirlpool sign, all showed mixed high signal in DWI. Adnexal hemorrhage was noticed in 6 cases and pelvic effusion in 8 cases. The pregnancy outcome was 6 full-term healthy fetuses and 8 preterm infants. Conclusion: MRI findings of AT in pregnancy have certain characteristics, which are helpful to diagnosis of AT combined with clinical manifestations.