what is stieda process
The lateral tubercle of the talus, when elongated, is referred to as Stiedaâs process (7a,8a). In addition, the lateral tubercle may articulate with a separate ossification center known as the os trigonum (6a). The os trigonum is corticated and articulates with the lateral tubercle via a synchondrosis.
At the rear surface of the talus, there is a large bony process with two prominent projections; one at the inner end called the medial tubercle and one at the outer side called the lateral tubercle. In some individuals, the medial tubercle is unusually large and is known as the Process of Stieda.