Fig 1.
Flowchart of the study population selection for this retrospective mass-matched case-control study.
Fig 2.
A 29-year-old woman with torsed left ovarian mature cystic teratoma.
Axial contrast-enhanced CT scan shows a thickened pedicle (arrow) between a left ovarian cystic mass (asterisk) and the left uterine cornu with helical swirling appearance, suggestive of a whirl sign.
Fig 3.
A 28-year-old woman with torsed left ovarian mature teratoma.
Coronal contrast-enhanced CT scan shows a thickened pedicle (curved arrow) left superior to the fatty mass (asterisk). Denting (arrow) of the mass surface at the attachment site of the thickened pedicle is suggestive of a navel sign. Note that the thickened pedicle also shows a whirl sign.
Fig 4.
A 23-year-old woman with torsed left ovarian mucinous cystadenoma.
A, Axial contrast-enhanced CT scan shows a thickened pedicle (arrow) between the left uterine cornu and a pelvic mass (asterisk). B, CT scan obtained caudal to image A shows uterine deviation (curved arrow) toward the thickened pedicle. Note that the right ovary (arrowhead) is seen separately.
Table 1.
Histologic diagnosis of the case and control women.
Table 2.
Clinical features of the case and control women.
Table 3.
The distribution of CT findings between the case (n = 43) and control (n = 43) group.
Table 4.
Diagnostic performance of individual and combined CT findings of adnexal torsion.
Fig 5.
A 58-year-old woman with right ovarian mucinous cystadenoma.
Axial contrast-enhanced CT scan shows a thickened pedicle (arrow) between a right ovarian cystic mass (asterisk) and the right uterine cornu. The thickened pedicle is not associated with a whirls sign or a navel sign. Uterine deviation is also not noted (not seen here). Surgery revealed a right ovarian cystic mass without torsion.
Fig 6.
A 32-year-old woman with left ovarian mucinous cystadenoma.
Uterine deviation (curved arrow) toward the pelvic mass (asterisk) is noted but there is no discernable thickened pedicle between the left uterine cornu and the pelvic mass. Surgery revealed a left ovarian cystic mass without torsion.