Unilateral femoral deformity due to a focal fibrous tether.

The purpose of this paper is to assess the radiological features of the unilateral angular deformity of the distal end of the femur secondary to a focal fibrous tether. Only five cases of this entity have been reported in the literature. We report another two patients. Magnetic resonance study was performed on one of them, which has not been used in previous cases. Both cases are described with illustrations of the typical radiographic appearances supplemented by CT and MR imaging.