Posterior tibial-tendon transfer in patients with cerebral palsy.

The results of fifty-seven posterior tibial-tendon transfers through the interosseous membrane to the dorsum of the foot that were performed in fifty-one patients who had cerebral palsy, and who were followed for a mean of 9.3 years (range, five to twenty-six years), were evaluated in terms of pattern of gait, alignment of the foot, formation of callus on the sole of the foot, and requirements for bracing. A good or excellent result was achieved in twenty-seven of thirty feet in the hemiplegic patients, twelve of sixteen feet in the paraplegic patients, and two of eleven feet in the quadriplegic patients. We found that in order for the tendon transfer to be successful the foot had to be passively correctable to at least a neutral position and that the tendon had to be passed superficial to the extensor retinaculum and inserted into the lateral cuneiform bone. The heel cord should be lengthened before the tendon transfer.