Introduction Tumors of the proximal tibia, in children, can affect the growth plate and pose a challenge to further reconstruction of the bone defects resulting from tumor resection. Reconstruction methods do not always compensate the potential for bone growth in this segment. We present a new surgical technique of bone reconstruction, based on the transposition of the ipsilateral fibula with its growth plate and the use of an internal sliding fixation device, without need for microsurgical technique.Case descriptionWe report two patients with osteosarcoma of the proximal tibia affecting the growth cartilage who were treated with the new technique.Discussion and EvaluationIn both cases, bone healing, hypertrophy and longitudinal growth of the transposed fibula were documented.ConclusionsThis new technique preserves the blood supply of the auto-transplanted bone segment, maintaining physeal growth potential, with no need for microsurgery. The implant allows longitudinal bone growth, which was radiographically confirmed.Level of evidenceCase report, Level IV.Electronic supplementary materialThe online version of this article (doi:10.1186/s40064-016-2042-7) contains supplementary material, which is available to authorized users.

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