Septic arthritis (SA) of the native adult hip is a rare orthopaedic emergency. To date, the role of advanced imaging has been confined to supporting or opposing diagnosis; however, implications for surgical decision-making and outcomes have not yet been established. We found that extra-articular abscesses are present in two out of three patients and require varying anatomical approaches. Therefore, we recommend routinely performing advanced imaging in all adults with SA of the native hip joint.

A total of 41 patients who underwent surgical treatment for septic arthritis (SA) of the native hip were studied. We show that patients with SA of the native hip can be divided in three distinct clinical subgroups based on route of infection. Route of infection is directly related to the chance of femoral head preservation and should, therefore, be the basis for decision-making. Only patients with blood-borne infections in an undamaged hip had a reasonable chance of femoral head preservation.

Cancerous transformation is a rare but potentially life-threatening complication of chronic bone infection. As with all forms of cancer, early detection and diagnosis is crucial to outcome.

Whilst there have been over 100 cases of chronic bone infection with cancerous transformation reported in the literature between 1999 and 2020, this is the first case report to document transformation with 20 years of concordant imaging and clinical review.

Clinical prognostic models are tools that predict treatment outcomes for individual patients. For adults with bone and joint infection treated with surgery and implant removal, this review found no existing unbiased clinical prediction models that took modifiable health factors into account to estimate prognosis. Developing a clinical prognostic model may help treatment decisions and future targeted research in orthopaedic infection.

This paper provides further evidence that treatment of osteomyelitis by serial debridement without the use of local antimicrobials has high recurrence rates (20 %–30 %). The addition of bioglass did not improve this compared to using bone graft alone. Additional systemic antibiotic was required in many cases, increasing the risk of antimicrobial resistance. Recent series of single-stage surgery with local antibiotic delivery have reported better outcomes.