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Geometric osteotomy and the results of treatment of axial deformities of lower extremities with this method have been presented. The major point of the procedure is cutting out a solid figure, usually a triangle based prism in order to achieve large contact surface and decrease muscle leverage at the site of the osteotomy. The method has been used in 12 operations around the hip and in 19 around the knee. Good results have been achieved with the exception of 4 children operated around the knee (3 of them because of Blount disease); the results were rated fair.

In 20 children with tibial and femoral bones deformities due to hypophosphatemic rickets a corrective osteotomy/osteoclasis at 2 or 4 sites was performed. Both preoperative and postoperative pharmacological treatment was introduced. Good results were achieved in 13 cases, satisfactory an 4 and bad in 3 cases.

A case of 12 years old girl operated on because of genu recurvatum and paretic clubfoot after buttock and thigh phlegmon in infancy has been presented. There were 2 stages. In the first one the correction of clubfoot was performed, m.quadriceps was elongated in the second one. Good cosmetic and functional result has been achieved.