Anatomical aspects of biopsy of the proximal fibula.

The relationship between the peroneal nerves and the anatomical structures near the fibular head were studied in 20 cadavers. It was the purpose to define the boundaries of a "safe" area when performing a biopsy of the fibular head. The distances between the proximal end of the fibular head and the deep peroneal nerve (26+/-0.32 mm) and the intermuscular septum (15+/-0.19 mm) were measured, as well as the angle between the deep peroneal nerve and the fibula as seen in the A-P view (23.5+/-3.5 degrees). We considered that biopsies should be performed with an anterolateral approach in the safe area formed by the fibular head and the deep peroneal nerve in the anterior compartment.