Abstract
BACKGROUND: Biportal endoscopic spinal surgery (BESS) was recently introduced and became prevalent fast. Incidental dural tear (IDT) could happen as one of the common complications even in endoscopic spine surgery. CASE DESCRIPTION: A 45-year old male underwent discectomy by BESS. IDT sized about 15mm at the dorsal surface of dura occurred during the laminotomy procedure with an osteotome. Revision surgery was planned for assuming that the IDT is small enough to be sealed with a patch. CONCLUSION: Revision surgery using BESS for a small-sized IDT could be reasonable alternative treatment to preserve the soft tissue, the primary purpose of MISS.