dural tail sign

dural tail sign2016-11-23T12:37:53+00:00

dural tail sign

dural tail sign image from New Medical Terms

dural tail sign

IMAGING

Definition A finding by contrast-enhanced MRI of the brain that was once regarded as specific for meningionas, in which a thickened and signal-enhanced dura mater is in continuity with the brain mass, appearing as a “tail” arising from the mass (here, the image has a tails at 6 o’clock and 12 o’clock). 

Criteria, dural tail sign:

• The tail should be seen on two successive slices of the tumour

• It should taper away from the tumour,

• Must enhance more than the tumour.

Differential diagnosis Once regarded as highly specific for meningiomas, it is seen in only 60% of meningiomas. It has also been described in nonmeningiomatous lesions–e.g., chloromas, primary CNS lymphomas, sarcoidosis, schwannomas, metastases, and syphilitic gummata.

Pathogenesis Uncertain; reactive change or actual tumour invasion. 

Reference Indian J Radiol Imaging. 2009 May; 19(2): 135–145.

doi:  10.4103/0971-3026.50835  

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