Genu valgum deformity means that the alignment of the leg to the thigh bone is excessively towards the outwards. These patients may also present with knock-knee in which the inside of the knee rubs each other while standing or walking. These patients have increased stress over the outer side of the knee as well as on the patellofemoral joint. If the patients are symptomatic and not improved with conservative means, then surgical treatment of genu valgum may be required to prevent long-term effects of early degeneration of the cartilage.