PMC6786353_01
Plain radiographs showing a spino-laminar anomaly on anteroposterior view (white arrow). Lateral Dynamic view radiographs showing displacement of anomalous spino-laminar process into the canal during extension (black arrow)
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Fig1
C5-C6 (Fig. 1). Computed tomography (CT) also clearly demonstrated an anomalous spino-laminar process with bilateral laminar invagination into the spinal canal, the presence of congenital cervical canal stenosis with an anteroposterior diameter of 10 mm from C2 to C5, and associated C5-C6 block vertebrae (Fig. 2).
CT sagittal images (a-right sagittal, b-mid sagittal, c-left sagittal) showing congenital cervical stenosis and C5-C6 block vertebrae. Coronal and axial images (d, e) show a posterior defect of axis at lamino-facetal junction, sclerosed edges of lamina which invaginates into the canal
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Fig2
C5-C6 (Fig. 1). Computed tomography (CT) also clearly demonstrated an anomalous spino-laminar process with bilateral laminar invagination into the spinal canal, the presence of congenital cervical canal stenosis with an anteroposterior diameter of 10 mm from C2 to C5, and associated C5-C6 block vertebrae (Fig. 2).
MRI para-sagittal (a, c) and mid-sagittal image (b) showing T2 hyper intensity changes extending from C2-C3 and cord compression due to invaginated laminar process (d) of axis evident on axial images. Also note the canal stenosis at C3-C4, C4-C5 levels (e, f)
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Fig3
It also showed degenerated discs with spondylotic changes at C3-C4 and C4-C5, which further accentuated the primary canal stenosis (Fig. 3).
Post operative radiographs (a, b) of patient showing C2-C6 posterior Instrumentation
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Fig4
The patient was ambulatory with a cervical orthosis within 1 day after surgery (Fig. 4).