What is the incidence and non-union rate of radiation-associated fractures? – A systematic review of the literature

Background

Radiation-associated fractures (RAFs) are a challenging complication in oncologic patients, yet their incidence remains unknown and optimal management lacks consensus.

Aim

This review aimed to evaluate the incidence of RAFs in the trunk, pelvis, and extremities as well as non-union rates of surgical and non-surgical treatment.

Materials and methods

A systematic review of PubMed and Embase databases was conducted. The study was registered on PROSPERO (ID: CRD42024513017). Studies were included if they reported RAFs in oncologic populations, had a sample size of at least five patients, and provided extractable data on RAF incidence or number. The STROBE checklist was utilized for evaluation of study quality. For eligible studies, quantitative analyses were conducted to determine weighted incidence of RAF and fracture non-union.

Results

Thirty-five studies comprising 9,980 patients treated with radiation therapy were included. The weighted incidence of RAFs was calculated to be 6.5% across 8,061 patients. The weighted incidence of femoral RAF was 5.2%, while pelvic RAF incidence was 17.1%. Non-union rates after initial treatment varied from 4% to 100%, with an overall weighted incidence of 48%. Treatments included intramedullary nailing, fixation with screws/plate, prosthetic replacement, conservative treatment, and amputation, with varying success rates.

Conclusion

This review highlights RAFs as a significant complication of radiation therapy, with a weighted incidence of 6.5% and a non-union rate of 48%. Advanced radiation techniques have reduced RAF occurrences, but non-union remains a challenge, necessitating tailored treatment strategies. Further research is needed to optimize RAF management and improve patient outcomes.