Ginkgo leaf sign (spinal meningioma)
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It is seen on axial post contrast T1 imaging, with the leaf representing the distorted spinal cord, pushed to one side of the thecal sac by the meningioma, and the stem, seen as a non-enhancing 'streak', probably representing the stretched denticulate ligament 1.
Although the initial report of this sign described a 58% sensitivity 1, subsequent studies by other groups have reported a sensitivity as low as 4% 2.
The ginkgo leaf sign is also used to describe the appearance of chest wall surgical emphysema (ginkgo leaf sign(chest)).
- 1. Yamaguchi S, Takeda M, Takahashi T et-al. Ginkgo leaf sign: a highly predictive imaging feature of spinal meningioma. J Neurosurg Spine. 2015;23 (5): 1-5. doi:10.3171/2015.3.SPINE1598 - Pubmed citation
- 2. Zhai X, Zhou M, Chen H, Tang Q, Cui Z, Yao Y, Yin Q. Differentiation between intraspinal schwannoma and meningioma by MR characteristics and clinic features. (2019) La Radiologia medica. 124 (6): 510-521. doi:10.1007/s11547-019-00988-z - Pubmed