Tillaux fracture is
**Core Concept**
A Tillaux fracture is a type of avulsion fracture that occurs at the anterolateral aspect of the distal tibia in adolescents. This injury is typically seen in skeletally immature individuals, particularly those with open growth plates. The fracture occurs when the anterior inferior tibiofibular ligament (AITFL) or the anterior portion of the distal tibia is avulsed due to a twisting injury.
**Why the Correct Answer is Right**
The Tillaux fracture is characterized by an avulsion of the anterolateral aspect of the distal tibia, often involving the anterior inferior tibiofibular ligament (AITFL). This ligament is a crucial stabilizer of the ankle joint, and its avulsion can lead to instability and pain in the ankle region. The fracture typically occurs in adolescents due to the open growth plates, which can be more susceptible to injury.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a correct description of a Tillaux fracture.
**Option B:** This option is not a correct description of a Tillaux fracture.
**Option D:** This option is not a correct description of a Tillaux fracture.
**Clinical Pearl / High-Yield Fact**
It's essential to recognize the typical age group and mechanism of injury associated with Tillaux fractures, as these factors can aid in diagnosis and management. The presence of an open growth plate in adolescents can make them more susceptible to this type of fracture.
**Correct Answer: A. A Tillaux fracture is an avulsion fracture at the anterolateral aspect of the distal tibia in adolescents.**