PMC4900023_01
Plain AP radiograph of the thoracic spine demonstrates multiple areas of heterotopic ossification (black and white arrows) in the paravertebral regions.
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Plain radiographs of the thoracic and lumbar spine (Fig. 1) demonstrated ossification of multiple intercostal and paraspinal muscles in sheet- and ribbon-like configurations.
(A) Axial T1- and (B) T2-weighted images at the L4 level demonstrate multiple heterotopic ossifications (arrows) in the paraspinal musculature on the left.
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These images (Fig. 2) revealed extensive ossifications of the paraspinal musculature and ligamentum flavum, which demonstrated signal characteristics of bone.
(A) Sagittal T1-weighted and (B) sagittal T2-weighted MR images of the thoracic spine demonstrate hypertrophy (arrows) of ligamentum flavum at the T9-10 level resulting in narrowing of the canal and compression of the cord at this level. (C) Corresponding sagittal CT reconstruction confirms the presence of heterotopic ossification (arrow) of the ligamentum flavum at this level.
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