conclusions the os trigonum syndrome should take in consideration in elderly subject who had posterior ankle pain starting after a car accident. case presentation a 62-year-old female patient was admitted with load depended ankle pain and swelling, lasting for five years which promptly started after a car accident. we incidentally discovered os trigonum on plain radiography on a lateral view of...

The os trigonum is an inconsistently present accessory bone of the foot situated at the posterolateral aspect of the talus. It may be radiographically confused with fractures of the posterior process of the talus. Fracture of the os trigonum per se is extremely rare. Hyperplantarflexion of the ankle is the mechanism of injury in which the os trigonum is compressed between the posterior malleolu...

The ankle is a common site of painful symptoms in athletes and nonathletes. Posterior ankle pain can be the end result of several pathologies, and a diagnostic challenge for rheumatologists. The posterior ankle impingement syndrome, also known as os trigonum syndrome and posterior tibiotalar compression syndrome, is a clinical disorder characterized by acute or chronic posterior ankle pain trig...

High levels of uric acid cause accumulation of monosodium urate crystals. This formation of masses is called tophus. Intraosseous tophus deposits are rare, even for patients with gout. We report an unusual case of intraosseous tophus deposits in the os trigonum. The patient presented with ankle pain with no previous history of gout. On examination, tenderness on the posterior aspect of his ankl...

In I 882 Shepherd reported three cases of fracture of the posterior process of the talus, which he had found while working in the dissecting room. In each case the fragment of hone consisted of the posterior part of the tubercle of the talus lateral to the groove for the tendon of the flexor hallucis longus, and had attached to it the posterior fasciculus of the lateral ligament of the ankle jo...