Lee SS, et al. - Authors evaluated the influence of post-operative hip–knee–ankle (HKA) alignment in total knee arthroplasty (TKA) patients with valgus deformity on clinical outcomes. They classified all patients into 3 groups based on post-operative HKA alignment: neutral (0 ± 3°), mild valgus (3°-6°), and severe valgus (> 6°) and compared them using the Western Ontario and McMaster Universities Osteoarthritis (WOMAC) index, the Knee Society (KS) knee score, KS function score, α-angle, β-angle, patella tilt angle, and the congruence angle. Findings suggested similar clinical outcomes by slight under-correction after TKA for a valgus knee. Patellar maltracking could be induced by a residual valgus angle of more than 6°.