Surgical Technique of Endoscopic-Assisted Flexor Hallucis Longus Tendon Transfer in Foot Drop.

The term "foot drop" is defined as the loss of active dorsiflexion at the tibiotalar joint. Surgical procedures such as tendon transfer may be considered in patients who have had foot drop for more than a year. The most commonly reported tendon transfer in the treatment of drop foot is the tibialis posterior tendon. In cases where the tibialis posterior tendon is non-functional, transfer of one of the non-standard tendons such as FHL tendon to the dorsum of the foot is performed. In the presented case, the surgical technique of endoscopic transfer of the FHL tendon was illustrated. The patient's AOFAS score was 50 points preoperatively and 78 points at the sixth postoperative month. The active dorsiflexion angle of the foot was increased to 0 degree from -30 degree.