Percutaneous low-energy osteotomy in treatment of pathological coronal knee deformities in pediatrics.

The aim of this study was to assess the safety and efficacy of percutaneous low-energy osteotomy and casting in treatment of pathological coronal knee deformities in children equal or younger than 6 years. A prospective nonrandomized case series study was conducted. A total of 62 (109 limbs) patients with pathological coronal knee deformities were treated by percutaneous low-energy osteotomy and casting and observed over 3-10 years. The pathological nature was variable (rickets, Blount disease, dysplasia, after trauma, or after infection). The average age at the time of surgery was 4.5 years (range: 3-6 years). Clinical and radiological outcomes were evaluated annually and at the end of follow-up period. There was a statistically significant improvement of the clinical appearance and the radiological parameters regarding mechanical axis deviation and tibiofemoral angle at the end of follow-up period. The total complication rate was 6.4%, with only four limbs with overcorrection and three limbs with recurrence. Percutaneous osteotomy is a simple, safe, and effective option in the treatment of children with coronal knee deformities equal or younger than 6 years.