PMC7924155_01
Lateral plain, weight-bearing radiograph of the right foot and ankle showing an ill-defined osseous body anterosuperior to the talus with a displaced fracture through the anterior aspect of the talus (arrow). There is also bony resorption and callus formation at the fracture margin. WT = weight.
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Plain radiographic imaging of the right ankle joint confirmed a displaced talar fracture with bony resorption (Fig. 1).
T1- (A) and T2- (B) weighted magnetic resonance images of the right foot showing a significant resorptive collapse of the talar head with marked marrow edema in the neck (arrows). There is also marked edema of several other midfoot bones and the small muscles of the foot. The differential diagnosis of these presentations is avascular necrosis or CN. CN = Charcot neuroarthropathy.
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Magnetic resonance imaging (MRI) of the right foot and ankle confirmed CN (Fig. 2 A and B) by demonstrating significant resorptive collapse of the talar head with marked marrow edema in the neck.
T1- (A) and T2- (B) weighted magnetic resonance images of the left foot. The arrows show subchondral fractures of the 3rd metatarsal and lateral cuneiform adjacent to the tarsometatarsal joint with extensive surrounding bone and soft tissue edema.
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MRI of her left foot confirmed early CN (Fig. 3 A and B).