Fig. 3

Case presentation: A 39-year-old man with right subarticular recurrent lumbar disc herniation at L4–L5 and L5–S1. a Magnetic resonance imaging (MRI) of the right subarticular protruded lumbar disc herniation in the first event. b Postoperative MRI after primary open lumbar microdiscectomy. c MRI of the recurrent lumbar disc herniation at the same level and direction at 2.5 years after the virgin surgery. d Postoperative MRI after biportal endoscopic lumbar redo discectomy: adequate decompression of the sequestrated nucleus and preservation of the facet joint. MRI magnetic resonance imaging