This document discusses different deformities of the knee joint, including genu varum (bow legs), genu valgum (knock knees), and genu recurvatum (hyperextension of the knee). It focuses on genu varum, describing it as an abnormal divergence of the knees caused by unequal growth of the medial and lateral epiphyseal growth plate. Genu varum is usually physiological in infants but can persist into adulthood due to conditions like rickets, injuries, or arthritis. Treatment options for persistent genu varum include surgical procedures like stapling of the physes, hemi-epiphysodesis, high tibial osteotomy, and Ilizarov's technique.