Table 2 Five modes of tumor prosthesis failure according to Henderson et al. (2011, 2012)

I

Soft-tissue: A functional deficiency of the soft tissue attachments about the implant. Includes instability, tendon rupture, and wound dehiscence

II

Aseptic loosening: Clinical and radiographic evidence of loosening of the prosthesis

III

Structural failure: Failure of either the implant or surrounding bone. Includes fractures of the prosthesis, periprosthetic fractures, and a deficient bony supporting structure

IV

Infection: Deep infection requiring removal of the implant

V

Tumor progression: Re-operation due to local tumor recurrence or metastatic disease progression