Two-stage revision for infected endoprostheses used in tumor surgery.

Thirty-four patients with infected massive endoprostheses had two-stage revision procedures to cure the infection and retain a useful functioning limb. An antibiotic impregnated cement spacer constructed with two cement gun liners and a Kuntscher nail provided temporary stability and also allowed a high dose of local antibiotic concentration. In three patients the infection never was controlled, and one of these patients had a successful second revision surgery. Six other patients had reinfection varying from 14 to 92 months after surgery. Risk factors for reinfection were previous radiotherapy and any additional operative intervention. The overall success rate for controlling infection was 91% at 1 year and 74% at 5 years. Six patients required amputation. The mean functional outcome for the retained limbs using the Musculoskeletal Tumor Society scoring system was 77%. Two-stage revisions seem almost as effective at controlling infection in massive endoprostheses as in conventional joint replacements, particularly if additional surgical interventions can be avoided.