PMC7414350_01
Frontal (a) and oblique (b) x-ray image of the right foot show an osseous cubonavicular coalition (arrowheads) with an absence of joint space. Lateral (c) x-ray image of the right foot shows degenerative changes with a spiky osteophytic deformation on the dorsal aspect of the first tarsometatarsal joint and a joint line irregularity (side shot).
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fig1
Achilles calcific spurs, an incidental finding of osseous cubonavicular coalition on the right foot (Figures 1(a) and 1(b)), and irregularity of the cubonavicular and calcaneonavicular articular surfaces on the left foot (Figure 2). Arthritic changes were visible on the dorsal aspect of the first tarsometatarsal joint on both feet (Figure 1(c)).
Oblique x-ray image of the left foot shows irregularity of the cubonavicular and calcaneonavicular articular surfaces with sclerotic changes.
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fig2
Achilles calcific spurs, an incidental finding of osseous cubonavicular coalition on the right foot (Figures 1(a) and 1(b)), and irregularity of the cubonavicular and calcaneonavicular articular surfaces on the left foot (Figure 2). Arthritic changes were visible on the dorsal aspect of the first tarsometatarsal joint on both feet (Figure 1(c)).
MRI of the right foot. Transversal T1-weighted (a) and PD-Fat Sat-weighted (b) images show a coalition between the cuboid and the navicular with a perfect continuity of the bone marrow and joint surfaces, without any bone oedema.
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fig3
MRI of the right foot showed insertional Achilles tendinosis and an osseous coalition between the navicular and the cuboid (Figure 3), as well as arthritic changes of the TMT1 (Figure 4(b)).
(a) Volume rendered CT image of the medial aspect of the right foot shows the same degenerative disorders as those shown in x-ray images, with a spiky osteophytic deformation on the dorsal aspect of the first tarsometatarsal joint. (b) Sagittal T1-weighted MRI image of the right foot shows a dorsal joint space narrowing (arrowheads), hypo T1 subchondral sclerosis and osteophyte formation (arrow).
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fig4
MRI of the right foot showed insertional Achilles tendinosis and an osseous coalition between the navicular and the cuboid (Figure 3), as well as arthritic changes of the TMT1 (Figure 4(b)). Computed tomography of both feet was also performed and confirmed the osseous cubonavicular coalition on the right foot (Figure 5), associated with a partial osseous coalition between the cuboid and the third cuneiform and bone irregularities between the first and second cuneiforms suggesting a nonosseous coalition (Figure 6), as well as arthritis in the tarsometatarsal joint (Figure 4(a)).
Osseous cubonavicular coalition of the right foot. Dorsolateral (a) and plantar (b) volume rendered CT images show the cuboidonavicular complex and its close relationship with the peripheral bones of the hindfoot and forefoot. Oblique multiplanar reconstruction CT image (c) shows as well as MRI the perfect continuity of the bone marrow and joint surfaces.
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fig5
Computed tomography of both feet was also performed and confirmed the osseous cubonavicular coalition on the right foot (Figure 5), associated with a partial osseous coalition between the cuboid and the third cuneiform and bone irregularities between the first and second cuneiforms suggesting a nonosseous coalition (Figure 6), as well as arthritis in the tarsometatarsal joint (Figure 4(a)).
Oblique multiplanar reconstruction CT image of the right foot shows osseous cubonavicular coalition, associated with a partial osseous coalition between the cuboid and the third cuneiform with a focal lack of subchondral bone plate (black arrowheads) and bone irregularities between the first and second cuneiforms suggesting a nonosseous coalition (white arrowheads).
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fig6
Computed tomography of both feet was also performed and confirmed the osseous cubonavicular coalition on the right foot (Figure 5), associated with a partial osseous coalition between the cuboid and the third cuneiform and bone irregularities between the first and second cuneiforms suggesting a nonosseous coalition (Figure 6), as well as arthritis in the tarsometatarsal joint (Figure 4(a)).
Dorsolateral volume rendered CT image of the left foot (a) shows hypertrophic arthritis changes between calcaneus and navicular due to nonosseous calcaneonavicular coalition. Oblique multiplanar reformatted CT images of the left foot (b-c) show a nonosseous calcaneonavicular coalition associated with a cuboidonavicular coalition (arrowheads), with degenerative changes between these tarsal bones.
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fig7
On the left foot, a nonosseous calcaneonavicular associated with a cubonavicular coalitions was diagnosed (Figure 7).