In children and young adults especially, bone allografts and autografts seem to be perfect and long-lasting alternatives to the use of prostheses after bone resection due to bone or soft- tissue sarcomas. However, several topics like osteoarticular massive allografts are still discussed controversially. Can allograft prosthesis composites reconstructions serve as stable and durable alternatives? Questions like this as well as the long-term results and the direct and indirect costs in comparison to tumour prostheses have not been answered sufficiently yet.

We, therefore, invite investigators to contribute original research as well as review articles that will enhance our knowledge on these surgical procedures or stimulate the scientific discussion on the limitations of this technique. We are particularly interested in articles describing new possible indications and critical reviews of current surgical approaches. Potential topics include, but are not limited to:

• Intercalary allograft reconstructions
• Vascularized versus nonvascularized bone grafts
• Osteoarticular allografts around the knee
• Osteoarticular allografts of the distal radius
• Biological reconstruction of the proximal femur in very young children
• The role of choosing a perfectly matched allograft
• Allograft-prosthesis composite reconstruction
• Allograft versus prosthesis; long-term outcome
• Is there a limit like age or location for allograft reconstruction?
• Strategies to deal with complications like pseudarthrosis

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