Dural Tail

The dural tail sign was first described only in 1989 by Wilms et al as thickening of dura surrounding meningiomas, and was initially thought to result from direct invasion of the dura, however subsequent studies demonstrated it to be more a reactive process. As experience grew, it became increasingly noted to be present in other conditions, although without the same regularity.
1. meningiomas - 60 - 72% have a tail.
2. Pleomorphic xanthoastrocytoma (PXA)
Also reported in:
chloroma
primary CNS lymphoma
sarcoidosis
vestibular schwannoma
metastatic tumours
syphilitic gumma
medulloblastoma
References
1. Wallace, E.”Dural tail sign” Radiology 2004;233:56-57
2. Bourekas, E.C et al “The dural tail sign revisited” AJNR 16:1514–1516, Aug 1995
3. Detwiler, P. et al “Medulloblastoma Presenting with Tentorial “Dural-Tail” Sign. Is the “Dural-Tail” Sign Specific for Meningioma?” Skull base surgery. 1998; 8(4): 233–236.
4. StatDx.com (Osborn)
Credit: Dr Frank Gaillard
http://www.radpod.org