“…In addition, there have been case reports of rare complications after lumbar discectomy, such as development of an arteriovenous fistula, major vessel injury, epidural fibrosis, ureteral injury, compartment syndrome with acute renal failure, iliac artery injury, intradural disc migration, bowel injury, septicemia, symptomatic pneumorachis, instrument failure, postoperative radicular neuroma, Ogilvie's syndrome, and reflex sympathetic dystrophy 3,4,10,12,13,[15][16][17]19,21,22,34,36,37,41,44,45,48,52) . In reports on cases subsequent to full endoscopic discectomy, published complications have included recurrent disc herniation on the same side, incomplete removal of a ruptured disc, infection, neuronal injury (including sensory changes), dural tears, vascular injury, psoas hematoma, and sympathetically mediated pain [6][7][8]11,14,[23][24][25][26][27]29,32,35,42,43,46,55) . In this study, symptomatic PP occurred in about 1% of patients after endoscopic discectomy and three cases treated by conservative manage showed decreased cyst size.…”