Intradural extramedullary spinal metastases of non-neurogenic origin: a distinct clinical entity or a subtype of leptomeningeal metastasis? A case-control study - Knafo, S; Pallud, J; Le Rhun, E; Club de Neuro-oncologie of the Société Française de Neurochirurgie (Neurosurgery, 2013)
, discussion 932