Outcomes with microsurgery of common peroneal nerve lesions.

Objectives: The purpose of this retrospective study is to present our results with peroneal nerve lesions, to examine the relative significance of various factors, to assess their effect on outcome, and to establish guidelines of treatment for the microsurgical management of these difficult lesions.

Methods: Over a 33-year period, a total of 62 patients were treated at McGill University and the Microsurgical Research Center, Eastern Virginia Medical School. The clinical records of all patients treated for peroneal nerve lesions were reviewed for retrospective analysis.

Results: Of 62 patients, 35 had microneurolysis and nerve decompression of the common peroneal nerve (CPn) as the only surgical procedure while 27 required reconstruction with nerve grafting. Postoperatively muscle power was graded from M + 4 to M - 5 in 27 patients, from M - 4 to M4 in 26 patients, from M - 3 to M + 3 in 8 patients, and from M - 2 to M + 2 in 1 patient. The behavioral video data showed a mean preoperative ankle dorsiflexion of 6.79° ± 5.6 and postoperative ankle dorsiflexion of 37.9° ± 9.3. Overall, excellent functional results were achieved in 27 of 62 patients (43%) with peroneal palsy who underwent microsurgical reconstruction, and good results were observed in 25 patients (40%).

Conclusions: Despite previous widespread pessimism, the surgical repair of CPn lesion is worthwhile, yielding good to excellent results in the majority of patients, after a careful preoperative consultation, establishment of a sound strategy of reconstruction and using aggressive and atraumatic microsurgery.