Lead Sponsor: Boston Children's Hospital

Collaborators: Children's Hospital of Philadelphia, Stanford University, The Cleveland Clinic, Children's Healthcare of Atlanta, Children's Hospital Medical Center, Cincinnati, Washington University School of Medicine, Tennessee Orthopedic Alliance, Rady Children's Hospital, San Diego, Hospital for Special Surgery, New York

Intervention / Treatment: OTHER: Non-operative treatment group will undergo standardized treatment which will include rehabilitation, bracing and certain activity restrictions, PROCEDURE: Surgical technique: Transphyseal reconstruction, PROCEDURE: Surgical technique: Partial transphyseal reconstruction, PROCEDURE: Surgical technique: Physeal sparing reconstruction by the Anderson method, PROCEDURE: Surgical technique: Physeal sparing reconstruction by the Micheli/Kocher method

Lead Sponsor: Washington University School of Medicine

Collaborators: Mayo Clinic, University of Iowa, Boston Children's Hospital, University of Colorado, Denver, Children's Hospital of Eastern Ontario, University of Wisconsin, Madison, University of Texas Southwestern Medical Center, CHU de Quebec-Universite Laval, William Beaumont Hospitals, Ottawa Hospital Research Institute, San Antonio Military Medical Center, Twin Cities Orthopedics, Regents of the University of Michigan

Lead Sponsor: Boston Children's Hospital

Collaborators: University of California, San Francisco, University of Michigan, Children's Healthcare of Atlanta, Washington University School of Medicine, Rady Children's Hospital, San Diego, Texas Scottish Rite Hospital for Children, Campbell Clinic

Intervention / Treatment: PROCEDURE: Surgery