II. Epidemiology
- Affects 10% of population
III. Anatomy
- Os Trigonum (Variant present in 14-25%)
- Adjacent to the Talus posterior margin
- Accessory Tarsal Navicular (Variant present in 4-14%)
- Adjacent to medial and posterior Tarsal Navicular margin
IV. Mechanism
- Jumping activities
- Ballet participation
V. Signs
- Stieda's process
- Pain on extreme plantar flexion
VI. Radiology: Foot XRay
- Compare with XRay of opposite foot
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Related Studies
Concepts | Congenital Abnormality (T019) |
SnomedCT | 134219008 |
Spanish | hueso trígono, hueso triangular del tarso (trastorno), hueso triangular del tarso, hueso trígono (trastorno), Os trigonum |
Portuguese | Osso trígono |
German | Os trigonum |
Czech | Os trigonum |
Dutch | os trigonum |
French | Os trigone |
Italian | Os trigonum |
Japanese | 足根三角骨, ソクコンサンカクコツ, ソッコンサンカクコツ |
Hungarian | Os trigonum |
English | Os trigonum, Os trigonum (disorder), Os trigonum disorder |