How is os trigonum diagnosis?
Imaging tests that can identify an os trigonum bone:
- X-ray: An os trigonum may be seen on an X-ray, which is a test that visualizes the structure of the bones.
- Computerized tomography (CT) scan: This test can be used to assess bone structure and swelling, and it can identify an os trigonum.
What is os trigonum and why is it significant?
The Os Trigonum Syndrome refers to pain posterior of the ankle and reduced plantarflexion caused by “the nutcracker-phenomenon”. When an os trigonum is present, this accessory ossicle together with surrounding soft tissues can become wedged between the tibia, talus and calcaneus.
What causes os trigonum syndrome?
Os trigonum syndrome is usually triggered by an injury, such as an ankle sprain. The syndrome is also frequently caused by repeated downward pointing of the toes, which is common among ballet dancers, soccer players and other athletes.
What is prominent os trigonum?
Os Trigonum Syndrome is a painful condition located on the back of the ankle that arises from an extra bone that sometimes develops from the back of the ankle bone (talus). The condition may also be referred to as posterior ankle impingement.
Is os trigonum normal?
Os Trigonum is a small extra bone that sits at the back of the ankle joint. This extra bone is present in 5-15% of the general population. In some cases, an Os Trigonum can cause ankle pain during sport, also known as posterior ankle impingement.
Is os trigonum a bone spur?
The os trigonum is a bony point of the posterolateral talus—meaning it’s an extra bone fragment, or bone spur, that sits on the back of the ankle near the heel bone that can cause pain and irritation with activity. This occurs in approximately 10-25% of the population.
Is os trigonum a disability?
The Veteran’s OS trigonum, left ankle, is currently rated under 38 C.F.R. § 4.71a, Diagnostic Code 5271, for limited motion of the ankle. Under those criteria a 10 percent rating is assigned for moderate limitation of motion and a 20 percent rating is assigned for marked limitation of motion.
What is os trigonum impingement?
Posterior ankle impingement is an uncommon problem that results from activities that utilize excessive pointing of the toes (or straightening of the ankle), most commonly dancing and ballet.
What attaches to the os trigonum?
The os trigonum is related directly to the flexor hallucis longus (FHL) and KFP. The posterior part of the talofibular ligament inserts on the os trigonum [8].
Does os trigonum require surgery?
Symptoms usually improve with non-surgical treatment. However, in some patients, surgery may be required to relieve the symptoms. Surgery typically involves removal of the scar or inflammatory tissue, and os trigonum if present, as this extra bone is not necessary for normal foot function.
What are the imaging features of Os Trigonum Syndrome?
The os trigonum syndrome: imaging features. The os trigonum syndrome refers to symptoms produced by pathology of the lateral tubercle of the posterior talar process. Pain can be caused by disruption of the cartilaginous synchondrosis between the os trigonum and the lateral talar tubercle as a result of repetitive microtrauma…
What causes Os Trigonum Syndrome?
The os trigonum syndrome refers to symptoms produced by pathology of the lateral tubercle of the posterior talar process. Pain can be caused by disruption of the cartilaginous synchondrosis between the os trigonum and the lateral talar tubercle as a result of repetitive microtrauma and chronic inflammation.
Is Os Trigonum Syndrome the same as posterior ankle impingement?
Os trigonum syndrome | Radiology Case | Radiopaedia.org 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 trigo…
What are the signs and symptoms of Os Trigonum synchondrosis?
Os trigonum with marrow edema across and within the synchondrosis. Mild posterolateral ankle joint capsule thickening and edema. Small effusion of the subtalar joint. Small tendon sheath effusion of flexor hallucis longus adjacent to the os trigonum.