Fig. 2From: Degenerative spine disease: Italian position paper on acquisition, interpretation and reporting of Magnetic Resonance Imaginga Migration of herniated disc (extrusion with inferior migration of the fragment). A migrated disc is described when extruded material has continuity with the disc of origin. b Herniation with sequestration. At L4–L5 large sequestered herniation with right-side caudal migration of the fragment which has no continuity with the disc of originBack to article page