PMC7489169_01
(a) Axial fat-saturated T2-weighted, (b) sagittal fat-saturated T2-weighted, (c) sagittal T1-weighted images show bone marrow edema within anterior arch of C1 (white arrows) and dens (black arrows). (d) Sagittal post-contrast, fat-saturated T1-weighted image reveals pathological enhancement at periarticular soft tissue and dens (asterisks). (e) Axial computed tomography shows high attenuation deposits around odontoid process (curved arrows).
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F1
C1 and pathological contrast enhancement at periarticular soft tissue (Figure 1a-d). Computed tomography (CT) revealed periodontoid calcified deposits suggesting CPPD (Figure 1e).
(a) Axial fat-saturated T2-weighted, (b) sagittal fat-saturated T2-weighted, (c) coronal short-tau inversion-recovery images show edema on C4-5 facet joints and perivertebral signal alteration adjacent to right C4-5 facet joint suggesting calcium pyrophosphate dihydrate deposition (arrows).
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Magnetic resonance imaging also demonstrated bone marrow edema on C4-5 facet joint and perivertebral signal alteration adjacent to the facet joint (Figure 2).