Total Knee Arthroplasty in a Patient with Bilateral Fused Hip due to Seronegative Arthritis: A Case Report

Abstract

Degenerative changes in other joints secondary to hip fusion occur due to changes in the relative biomechanical forces acting on those joints. At present, there are no standard protocols to aid the decision-making process of joint replacement surgery in patients with hip fusion due to secondary arthritis causes. Each patient requires tailored management planned by the surgeon to optimise treatment plan and achieve the highest degree of functional improvement. Total Knee Arthroplasty (TKA) is a welldocumented, common, and cost-effective procedure in the management of morbidities associated with joint degeneration due to wear and tear of the cartilage. TKA in patients with hip fusion is relatively rare, and there are few case reports and studies indicating a standardised approach and treatment protocols for the same. In this case report, TKA due to symptomatic knee arthritis in a patient with a 15-year history of spontaneous bilateral hip fusion due to seronegative arthritis is discussed. Postoperatively, the patient’s condition was stable, with good Range Of Motion (ROM) at the knee and without aseptic features as determined by recent radiologic investigations.