The pes anserinus transfer. A long-term follow-up.

We evaluated forty-eight patients (fifty knees) with pes anserinus transfer at an average of nine years after operation. There was a high incidence of anteromedial and anterolateral rotatory instability. The incidence (54 per cent) of significant roentgenographic changes at follow-up was also high. Although many patients were improved symptomatically after pes anserinus transfer, only nineteen patients (38 per cent) had no limitation of function.