PERONEAL ENTRAPMENT OF THE COMMON PERONEAL NERVE DUE TO REPETITIVE ABDUCTION OF THE FLEXED KNEE-JOINT

An unusual case of common peroneal nerve entrapment is reported. In a flexed knee position a machine worker manipulated a switch of a machine 1000 times per day by abduction of the thigh and knee. Due to this specific performance the biceps femoris muscle possibly has hypertrophied and/or the common peroneal nerve was compromised between the biceps femoris and lateral head of the gastrocnemius muscle, or direct mechanical irritation of the nerve proximal to the knee joint possibly caused the peroneal entrapment. After soft-tissue revision proximal to the knee joint with exposure of the muscular constriction and neurolysis of the common peroneal nerve the patient was relieved of his symptoms.