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Citation:
Gaillard F, Yap J, Elfeky M, et al. Tubal ring sign. Reference article, Radiopaedia.org (Accessed on 06 Oct 2024) https://doi.org/10.53347/rID-2219
The tubal ring sign, also referred to as a bagel sign or blob sign, is one of the ultrasound signs of a tubal ectopic pregnancy. It comprises an echogenic ring that surrounds an unruptured ectopic pregnancy. It is said to have a 95% positive predictive value (PPV) for ectopic pregnancy.
Differential diagnosis
It can be mimicked by a normal corpus luteum. Bimanual examination can be useful to differentiate an ovarian corpus luteum (moves with the ovary) from a tubal ectopic (moves separately from the ovary). Normal ovarian tissue may also be noticeable around a corpus luteum.
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1. Weissleder R, Wittenberg J, Harisinghani MM et-al. Primer of Diagnostic Imaging, Expert Consult- Online and Print. Mosby Inc. (2011) ISBN:0323065384. Read it at Google Books - Find it at Amazon
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2. Chudleigh P, Thilaganathan B. Obstetric ultrasound, how, why and when. Churchill Livingstone. (2004) ISBN:0443054711. Read it at Google Books - Find it at Amazon
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3. George Condous, Emeka Okaro, Tom Bourne. The management of ectopic pregnancies and pregnancies of unknown location. (2004) Gynecological Surgery. 1 (2): 81. doi:10.1007/s10397-004-0013-4
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