Recurrent dislocation of tibialis posterior tendon. A report of two cases.

We successfully treated two patients with recurrent dislocation of the tibialis posterior tendon by creating a bone block. Sudden resistive contraction of the tibialis posterior muscle is considered to be the mechanical cause of the initial traumatic injury, and a shallow tibialis posterior tendon sulcus may be the predisposing factor. Once the flexor retinaculum is torn during the initial trauma, recurrent dislocation is inevitable, and surgical treatment is mandatory. When treating patients with a complaint of long-standing pain around the medial malleolus, we must bear in mind the possible diagnosis of recurrent dislocation of the tibialis posterior tendon. If the patient can voluntarily dislocate the tendon by active plantar flexion and inversion of the ankle, the diagnosis is definitive.