Department of Radiology and Medical Imaging, University of Virginia, 1215 Lee Street, Charlottesville, VA, 22908, USA.
Department of Radiology, St. Vincent's Medical Center, Bridgeport, CT, 06606, USA.
Emerg Radiol. 2021 Jun;28(3):621-626. doi: 10.1007/s10140-021-01904-7. Epub 2021 Jan 26.
To look for the presence of "perifollicular rim sign" on non-contrast CT in surgically proven cases of ovarian or adnexal torsion.
A retrospective analysis of abdominopelvic non-contrast CT examinations in surgically proven cases of ovarian or adnexal torsion was conducted seeking the presence of "perifollicular rim sign" in torsed ovaries. "Perifollicular rim sign" was defined as a complete ring of perifollicular hyperdensity around ovarian follicles with an attenuation value of > 50 HU and thickness > 1-2 mm. A positive sign was equated to the presence of perifollicular hemorrhage. Pre-operative non-contrast CT was available in 7 out of the 39 ovarian or adnexal torsions included in our study.
"Perifollicular rim sign" was present in 5 out of the 7 ovarian torsions on pre-operative non-contrast CT. MRI correlation was available in one patient. Ovarian enlargement (>4 cm) was present in all 7 cases.
In an appropriate clinical setting, presence of "perifollicular rim sign" in an enlarged ovary on non-contrast CT examination can be considered a useful additional sign for ovarian torsion.
在经手术证实的卵巢或附件扭转病例中，寻找非增强 CT 上是否存在“滤泡旁环征”。
对经手术证实的卵巢或附件扭转病例的腹盆腔非增强 CT 检查进行回顾性分析，寻找扭转卵巢中是否存在“滤泡旁环征”。“滤泡旁环征”定义为围绕卵巢卵泡的完整环状滤泡旁高密度影，其衰减值>50HU，厚度>1-2mm。阳性征等同于滤泡旁出血。本研究共纳入 39 例卵巢或附件扭转病例，其中 7 例术前有非增强 CT 检查。
术前非增强 CT 上 5 例卵巢扭转病例存在“滤泡旁环征”。其中 1 例有 MRI 相关性。7 例均有卵巢增大（>4cm）。
在适当的临床环境下，非增强 CT 检查中增大卵巢上存在“滤泡旁环征”可被视为卵巢扭转的一个有用的附加征象。
