Friday, September 28, 2018 10:30 AM–12:00 PM abstracts: deformity: technical factors: 164. Incidence, risk factors and the natural history of proximal junctional kyphosis: review of long term surgical outcomes using hybrid fusion constructs for adolescent idiopathic scoliosis - Pugely, Andrew J.; Labianca, Luca; Kalakoti, Piyush; Gajaseni, Pawin; Weinstein, Stuart L. (Spine Journal, 2018)