Dural tail sign (DTS) is a term used to describe thickening of the dura adjacent to an intracranial neoplasm on contrast-enhanced T1 MR images. This sign was first thought to be pathognomonic of meningioma, however, many subsequent studies demonstrated this sign is adjacent to various intra- and extra-cranial pathologies and in spinal lesions. DTS has been involved with tumoral cells in more than 50% of published examinations and the remaining pathologic examinations have described vascular congestion and inflammation.
DTS pathology DTS has been reported in primary and secondary central nervous system (CNS) lymphoma, chloroma, metastasis (extra- and intra-axial), multiple myeloma, glioblastoma multiforme (GBM), etc. DTS can be seen in all locations of the dura adjacent to meningioma in the falx, tentorium and cerebral convexities. DTS is less frequently seen in the posterior fossa and…
