**1. Introduction**

Valgus deformity of the knee occurs in the presence of a valgus alignment of the anatomical axes of the femur and tibia in the frontal plane greater than 10° [1]. Although osteoarthritis is the most common pathology related to this deformity in adults, other events and diseases, such as post-traumatic deformities, rickets, renal osteodystrophy, inflammatory pathologies such as rheumatoid arthritis, systemic lupus erythematous, psoriatic arthritis, or even hemophilic arthropathy are commonly associated [2].

Valgus deformity accounts for approximately 20% of the patients undergoing total knee arthroplasty (TKA) and can impose some challenges for the knee surgeon [1]. Proper coronal deformity correction is widely accepted as crucial for the success of a TKA [3]. It is recognized that the correction of a valgus deformity has technical particularities that need to be recognized by the knee surgeon when performing a TKA. It comprises surgical approach, bone cuts, and mostly ligament balance [1, 2, 4].
