Only a few articles based on the management of symptomatic knee osteoarthritis in patients with prior ipsilateral hip arthrodesis have been reported, and there are no clear criteria for the best treatment option [to carry out a total knee arthroplasty (TKA)-or to take down the hip fusion and conversion to a total hip arthroplasty-THA, and after that to carry out the TKA]. We report two cases, a 72-year-old male who underwent a left hip arthrodesis at 28 because of a trauma and a 51-year-old woman who underwent a left hip arthrodesis at 9 years because of a congenital dislocation. They presented severe ipsilateral symptomatic knee osteoarthritis. Once the cases were studied and the two therapeutic possibilities were evaluated, we decided to perform TKA. Currently, both patients have no pain, a stable knee with good range of motion and without aseptic loosening radiologic criteria.
Keywords: Hip arthrodesis; Knee osteoarthritis; Total hip arthroplasty; Total knee arthroplasty.