Kim JT, Kim HS, Lee YK, et al. - Considering the risk of femoral fracture or perforation, stem malposition and failed stem fixation in correlation with a proximal femoral deformity in patients undergoing total hip arthroplasty (THA), researchers remove the greater trochanter in case of a varus deformity, and the lesser trochanter in case of valgus deformity, to insert a femoral stem in neutral position with a good fit while performing THA. They performed evaluation of stem position, implant stability, clinical results and radiological changes after THAs employing this technique. Using the trochanteric ostectomy technique, cementless THA was performed on 15 patients (17 hips; 11 varus hips and 6 valgus hips) in one institution. Bone-ingrown stability was achieved in all stems and no revision was required in any stem. Improvement in the mean Modified Harris hip score was observed from 50 points at the preoperative evaluation to 81 points at the final follow-up. Per observations, neutral insertion of cementless stem in patients with varus/valgus deformity of the proximal femur was enabled by the trochanteric excision, and favorable results were obtained after THA using this technique.