Os trigonum syndrome


Os trigonum syndrome is generally considered synonymous with posterior ankle impingement syndrome, although the latter can occur without the presence of an os trigonum, many of the other features of soft tissue inflammation are the same. Os trigonum are a common finding, and are usually asymptomatic - in this case, however, there is edema affecting the os trigonum and its synchondrosis with the talus in the appropriate clinical context.