Original ResearchPublished 8 October 2026Association of preoperative Pfirrmann grade with 12-month outcomes after interlaminar full-endoscopic lumbar discectomy with successful annular suture repair: a single-center retrospective cohort studyLei Zhou · Haoyun Huang · Song Zhu · Xin Chen · Yunchuan Gou · Jikun Sun · Pin Xie · Yi Zhou · Rigao ChenFrontiers in Surgerydoi 10.3389/fsurg.2026.1924468