A lateral foot projection obtained in a patient whose leg was externally rotated (heel off IR) demonstrates
1)more than 0.5 inch (1 cm) of the cuboid posterior to the navicular.
2)the fibula situated too posterior to the tibia.
3)the lateral talar dome anterior to the medial talar dome.
4)an obscured tibiotalar joint space.
A) 1 and 2 only
B) 2 only
C) 3 only
D) 2 and 4 only

Question

Quizplus · Accepted Answer

An externally rotated foot can cause the fibula to appear too posterior to the tibia, which is seen in option 2. Additionally, this projection can result in an obscured tibiotalar joint space, which is noted in option 4. Option 1 is incorrect as there should be no more than 0.5 inch (1 cm) of the cuboid posterior to the navicular. Option 3 is incorrect as the lateral talar dome should be posterior to the medial talar dome in a lateral foot projection.

A Lateral Foot Projection Obtained in a Patient Whose Leg