Final answer:
To define internal tibial torsion, a physical exam is performed to assess the alignment of the leg, particularly the inward twisting of the tibia in relation to the foot and femur, which is not directly related to syndesmotic ankle injuries or Pott's fracture.
Step-by-step explanation:
The physical exam result that can define internal tibial torsion involves assessing the alignment and structure of the leg, particularly around the ankle joint. In the context of the anatomy described, internal tibial torsion would be less likely related to the syndesmoses or the injury patterns like a high ankle sprain or Pott's fracture. Instead, internal tibial torsion is typically identified during a physical examination by observing the axis and position of the tibia in relation to the foot and femur, often while the patient is sitting or lying down with their legs extended. The torsion is noted by the inward twisting of the tibia, which can cause the feet to turn inwards.