Management of metal-on-metal hip implant patients: Who, when and how to revise?

Figure 1 Diagram demonstrating the spectrum of concern for patients with metal-on-meta hip implants. The decision on how to manage patients at the extremes of the spectrum is relatively straightforward. However the majority of patients fall into to the middle category, where the management is uncertain or difficult. MRI: Magnetic resonance imaging; MARS: Metal artefact reduction sequence.