An anomalous variation in the division pattern of the common peroneal nerve

The muscles of the leg are partitioned into three compartments (anterior, lateral, and posterior) by two intermuscular septa that have separate innervations. Anterior compartment is innervated by the deep peroneal nerve and lateral compartment is innervated by the superficial peroneal nerve. Common peroneal nerve divides into superficial and deep peroneal nerve at the neck of fibula. An unusual finding in the dividing pattern of the common peroneal nerve in the male cadaver on the left side was observed. This finding is of academic interest and clinical significance to the orthopedician operating on the proximal fibula for nerve decompression, high tibial osteotomy, and nerve transfer operations.