Follicular ring sign
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At the time the article was created Rania Adel Anan had no recorded disclosures.View Rania Adel Anan's current disclosures
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The follicular ring sign is considered as a characteristic sonographic sign for early diagnosis of ovarian torsion 1. It is defined as a prominent (1-2 mm thick) hyperechoic margin seen concentrically around the antral follicles of the torsed ovary, which are usually small (3‐7 mm in diameter) and peripherally displaced.
The antral follicles in normal ovaries can sometimes have hyperechoic margins due to acoustic enhancement, but they are imperceptible and not seen all around the follicle.
- 1. Sibal M, Sibal. Follicular ring sign: a simple sonographic sign for early diagnosis of ovarian torsion. (2012) Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine. doi:10.7863/jum.2012.31.11.1803 - Pubmed