March 17, 2026 | 8 PM EST
Drs. Zeeshan Sardar, Lawrence Lenke, H.J. Kim, and Ron Lehman lead an in-depth, case-based discussion on Iatrogenic Flatback. This session focuses on discussion around avoiding iatrogenic sagittal malalignment and revision strategy that restores alignment while minimizing mechanical complications.
Key discussion points include:
- Diagnosis & “Why it happened”: recognizing segmental vs global lordosis loss, and pitfalls of short-segment hypolordotic fusion
- Alignment targets
- Choosing the right correction tools: interbodies and osteotomies
- Prevention of PJK/PJF and other mechanical failures in flatback revisions
Chairs

Larry Lenke, MD
Co-Chair
Co-Director, Och Spine
Surgeon-in-Chief of Och Spine Hospital @ NYP/Allen
NewYork-Presbyterian Och Spine Hospital
Professor of Orthopedic Surgery (in Neurological Surgery) with Tenure
Chief of Spinal Deformity Surgery
Co-Director of Adult and Pediatric Comprehensive Spine Surgery Fellowship
Co-Director of Advanced Pediatric Spinal Deformity Fellowship
Columbia University Vagelos College of Physicians and Surgeons
Past President Scoliosis Research Society 2010-11
New York, NY

Zeeshan Sardar, MD
Co-Chair
Spine and Scoliosis Surgery
Associate Professor of Orthopedic Surgery (in Neurological Surgery)
Co-Chief of Spinal Deformity
Medical Director, Spine Unit – Och Spine Hospital
Co-Director Och Spine Grand Rounds
Co-Chair, Data Operations Committee, American Spine Registry
Columbia University, College of Physicians and Surgeons
Och Spine Hospital at New York Presbyterian/Allen
New York, NY
Faculty

Han Jo Kim, MD
Panelist
Professor of Orthopaedic Surgery
David B. Levine, MD Endowed Chair
Director, Complex Spine and Scoliosis Center
Spine Fellowship Director, Fellowship Committee Chair
Hospital for Special Surgery, New York
New York, NY

Ronald A. Lehman, Jr., MD
Panelist
Professor of Orthopaedic Surgery, Tenure (in Neurological Surgery)
Co-Director, Och Spine Allen/NYP
Spine Medical Director, Och Spine Allen
Division Chief of Spine Surgery
Director, Adult and Pediatric Spine Fellowship
Director, Athletes Spine Center
New York, NY
Sponsored by Kuros Biosciences
