Introduction
The posterior intermalleolar ligament (IML), although first described already 280 years ago, it is, however, still an unknown structure for many anatomists and orthopedic surgeons.
Materials and methods
A literature search of original publications and historical sources was performed without language restrictions.
Results
The intermalleolar ligament, first described by Weitbrecht in 1742, is a variable, but constant structure reinforcing the posterior capsule of the ankle joint. Many French anatomists described and depicted this ligament in detail, which they called “faisceau accessoire”, or “faisceau tibial du ligament péronéo-astragalien postérieur”. In 1951, Georges Paturet introduced the term “faisceau intermalléolaire postérieur”. Sarrafian, in 1983, adopted Paturet́s description of the IML and called it the “posterior intermalleolar ligament”. This term has gradually become domesticated in the English literature, primarily thanks to Rosenberg et al., who, in 1995, published the first anatomical and MRI study of the IML.
Conclusion
The IML is a highly variable ligament reinforcing the posterior articular capsule of the ankle joint, passing between the posterior tibiofibular ligament and the posterior talofibular ligament. It can be visualized by MRI and is visible during posterior arthroscopy of the ankle. Its clinical importance lies in the fact that it may contribute to posterior impingement of the ankle joint.
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