الفهرس 
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Abstract
angular deformity around the knee one of the most common presentation in pediatric orthopaedic clinic,it may be aphysiological self-limiting disease which may corrected spontaneously with aging of the child,in other conditions need intervention to prevent early development of osteoarthritis because of joint orientation and load on the mechanical axis of the knee joint, the methods of management differs according to age and degree of the deformity and preference of the surgeon,,in our study we use one of most effective method of management of knee deformity is doing osteotomy and fixation by another method of fixation as we use external fixation by monolateral external fixator, advantages of external fixation on internal fixation are small incisions,less bloody,less time consumping surgery, early weight bearing in case of external fixation,less complications of compartment syndrome as previously mentioned in our study, we operate 24 limb in children between 10-16 yrs of both genu varus and valgus deformity, : The duration of union (months) of the studied patients had a mean value (± SD) of 2.23 (±0.42) years. Post-operative correction occurred in all the patients. Pain score after removal of fixation was mild in 13 (54.17%) patients, moderate in 8 (33.33%) patients and severe in 3 (12.5%) patients. Degree of flexion was >70 in 2 (8.33%) patients, >80 in 3 (12.5%) patients, >85 in 2(8.33%), >90 in 3(12.5%), >100 in 3(12.5%), 110 in 6 (25%%) and 120 in 5 (20.83%) patients. Infection after removal of fixation was absent in 12 (50%) patients, pin tract infection in 10 (41.67%) patients and Superficial infection at osteotomy site in 2 (8.33%).
conclusion
Minimally invasive correction with mono-lateral external fixator in patients with angular deformities around the knee is associated with positive outcomes. This includes postoperative correction, decreased pain after removal of fixation and low percent of infection rates.