AAPOR RR1	American Association for Public Opinion Research First Response Rate
AAPOR RR2	American Association for Public Opinion Research Second Response Rate
dF	Distal femur megaprosthetic replacement
EMSOS	European Musculoskeletal Oncology Society
EU	European Union
ISOLS	International Society of Limb Salvage
MoReSports online survey	Modular Replacement Sports Survey
MSTS	Musculoskeletal Tumor Society
pF/ext.Ap	Proximal tibia megaprosthetic replacement with extensor apparatus reconstruction (e.g., gastrocnemius flap)
pF/Hemi	Proximal femur megaprosthesis without acetabular replacement
pF/THR	Proximal femur megaprosthesis with acetabular replacement
pT/composit	Proximal tibia megaprosthetic replacement with composite allograft prosthesis
QOL	Quality of life
TKR	Total knee replacement
UCLA Score	University of California Los Angeles Sports Activity Score