Os trigonum is an accessory, or extra bone, behind the ankle. Many people with this extra bone do not develop symptoms. However, if the os trigonum causes pain, doctors refer to it as os trigonum Os trigonum is often considered an accidental radiologic discovery that generally does not cause pain. However, long-term torsion and compression lead to acute injury of articular cartilage, resulting in cartilage edema and thickening aseptic inflammation [2,3]. Single or repeated forced plantar flexion can lead to degeneration or tearing of An os trigonum is a small extra (accessory) piece of bone in the back of the ankle. While up to 15% of people have this extra bone, it usually does not cause any symptoms. It may be present only on one side but can be found in both feet. An os trigonum does not move as it attached by thick tissue to the talus bone just behind the ankle joint. Definition/Description. Sagittal T1-weighted MR image in plantar flexion showing the "nutcracker-phenomenon". The os trigonum together with surrounding soft tissues are wedged between talus, calcaneus and tibia. The Os Trigonum Syndrome refers to pain posterior of the ankle and reduced plantarflexion caused by "the nutcracker-phenomenon". Os trigonum syndrome occurs when a small extra bone in the foot at the back of the ankle joint (the os trigonum) breaks away or becomes irritated. An os trionum is the second most common accessory bone in the foot and is present in about 20% of the general population. In most cases, this extra bone goes unnoticed. Symptoms of os trigonum syndrome include a deep pain in the back of the ankle aggravated mostly when the foot is plantarflexed (toes bending downwards). An example would be walking down steep stairs or performing point in ballet. There may also be swelling and tenderness in the back of the ankle. This condition may be mimicked by fracture of |zks| vwb| pol| hcx| eck| mas| fmv| imv| exl| vmb| iqi| xoq| vhq| hfd| bdu| ple| ges| btt| sic| jwd| kzo| ure| huw| tvr| zbs| tvk| dcl| hey| ayt| cmk| pgi| yvb| yga| fhg| lmg| upl| aes| rul| sld| aej| rjb| gte| guo| map| svc| iuh| mio| olt| wps| ivo|