The os trigonum.

Fracture of the os trigonum: a case report.

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...

Intraosseous tophus deposits in the os trigonum.

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...

Os Trigonum Syndrome

Surgical management of os trigonum and talar spur in sportsmen.

The os trigonum is present in 7.7% (Basmajian 1975) of .............. the population and may be unilateral or bilateral. It is a developmental anomaly, an accessory bone behind the l talus and above the calcaneum. Generally it is of no significance. It may however cause trouble, in jumping, ballet and fast bowling where impulsive plantar flexion while weight-bearing is involved. It then behaves...

Posterior ankle impingement syndrome: a diagnosis rheumatologists should not forget. Two case reports.

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...

Posterior ankle impingement in fast bowlers in cricket.

OBJECTIVE To determine common features of posterior ankle impingement in fast bowlers in the West Indies and to compare modes of treatment with respect to return to play without pain. METHODS Retrospective analysis of ankle impingement injuries treated in fast bowlers in the West Indies. RESULTS Six fast bowlers had evidence of os trigonum in the front foot only. Pain was felt on forced pla...