Although research is abundant and the biomechanical effects of various treatments on the hindfoot are well detailed, there is no clear agreement about the optimum technique or procedure to conduct in the case of flexible pes planovalgus foot deformity. This is a systematic evaluation to assess the impact on the existing published literature of idiopathic flatfoot lateral column lengthening osteotomy in teenagers. This review was conducted according to the 2015 PRISMA-P checklist (Preferred reporting items for systematic review and meta-analysis protocols). Twenty-one articles were evaluated against inclusion criteria by reading the entire text and seven papers were found. The mean AOFAS scores were 56.08 (range 23–78) while the mean AOFAS postoperative scores were 92.21 (range 34–100). Two studies that utilised criteria showed that Good/Excellent resulted in 72 percent (23/32 feet) and Fair/Poor, 18 percent (9/32) feet. Subjective and objective scoring were utilised for ACFAS, however only postoperative results were provided. Complications in 27 (16.5%) of 164 individuals have been recorded. Sural neuropathy, pseudo-arthrosis, non-union, calcaneocubosis, metal irritation, and adhesion were frequent consequences. Child and young adults with lateral column lengthening surgical treatments for Pes planovalgus deformity had excellent, medium-term, clinical and radiological outcomes with high patient satisfaction and an acceptable degree of complication.