Epidemiology
Incidence isolated deltoid ligament injury 2.5%
Anatomy
Strong fan-shaped structure
- composed of a deep and superficial layer
Superficial layer
- inserts as one continuous structure
- navicular anteriorly, spring ligament (calcaneonavicular), sustentaculum, and calcaneum
- measures 10 mm wide at its origin and 2 to 3 mm thick
- length varies from 20 to 30 mm
Deep layer
- inserts onto the nonarticular medial wall of the talus
- most of the fibers concentrated on the posterior medial aspect of the talus
Management
Isolated deltoid injuries are extremely rare
- need proximal fibular xrays to exclude maisonneuve injury & / or syndesmotic injury
- treated in a cast or brace