Treatment of Severe Valgus Knee Deformity in Patients with Ipsilateral Coxarthrosis

A Report of Five Cases

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Objective: Adjacent joints including hip joints and knee joints mutually affect each other due to leg length discrepancy and extremity malposition, and severe deformity of these joints may progress. Coxitis knee is the name applied to the particular form of osteoarthritis associated with ankylosis or fixation of the hip joint. Rotational limitations of hip joint and leg length discrepancy cause severe stress to the coxitis knee during walking, resulting in external rotation of the tibia and valgus deformity of the knees, which increase the load on the knee. Materials: In this paper, we describe five cases of total knee arthroplasty performed for severe valgus deformity in patients with ipsilateral coxarthrosis. We investigated the conditions and issues of concern in these patients and report the outcomes. Conclusions: Since the condition of the hip joints is significantly related to valgus knee, it is necessary to carry out comprehensive investigation of the alignment of the legs including not only knee joints but also hip joints. If there is no other option but surgical treatment of the knee joints, then this approach must be prioritized and various efforts must be made.