Acute posterior tibialis tendon rupture is a rare injury, most often occurring in association with ankle fractures or severe sprains, and isolated traumatic lacerations are exceptionally uncommon. In this study, we present a 53-year-old Iranian female who arrived with persistent medial ankle pain and lameness as her chief complaint following a glass-induced laceration. On physical examination, she exhibited tenderness and swelling along the medial ankle, difficulty performing a single heel-rise, and weakness in foot inversion, while neurovascular status remained intact. MRI evaluation demonstrated complete rupture of both the posterior tibialis and flexor digitorum longus tendons, without any concomitant ankle fractures. Intraoperative findings confirmed the diagnosis, and given the condition of the tendon ends, primary tendon repair was selected as the surgical approach. The ankle was immobilized for six weeks postoperatively, after which physiotherapy was initiated. At the three-month postoperative follow-up, the patient demonstrated significant pain relief, improved inversion strength, and normalization of gait.
Keywords: Ankle trauma; Case report; Flexor digitorum longus; Magnetic resonance imaging; Tendon laceration; Tibialis posterior tendon.
© 2026 The Author(s).