“Bump” thought to represent aberrant clava, used as marker for cervicomedullary junction Abnormal tonsillar “pistoning” motion, reduced CSF flow around foramen magnum and cerebellar tonsils • ± syringohydromyelia, ventral cervicomedullary compression…
Infantile presentation (“congenita”) Intermediate presentation Adult presentation (“tarda”) • All feature abnormal osteoclastic activity Clinical Issues • Fractures, pain, neurologic symptoms • Growth disturbance in infantile forms Diagnostic Checklist • Osteopetrosis in differential diagnosis…
(Left) Sagittal T1WI MR in a leukemia patient with leg weakness following intrathecal chemotherapy shows normal appearance of the conus and cauda equina. (Right) Sagittal T1WI C+ MR in a…
(Left) Axial graphic shows the anteromedial approach (green line), which uses the space between the sternocleidomastoid muscle and the tracheoesophageal complex medially. The anterolateral approach (black line) posterior to the…
Very rare in antibiotic era General paresis, dementia, tabes dorsalis (sensory ataxia with bowel and bladder dysfunction) Clinical Issues • Lower extremity weakness, pyramidal signs, bowl and bladder dysfunction, polyradiculopathy • Nontreponemal…
Anteroposterior radiography depicts a typical supernumerary hemivertebra positioned between the right L2 and L3 vertebral levels, resulting in convex right scoliotic curvature. Coronal T1WI MR depicts a small left thoracic…
(Left) Sagittal graphic of a disc bulge shows generalized extension of the disc margin beyond the vertebral body . An axial view must show generalized extension > 90° of the…
(Left) Thoracolumbar anteroposterior radiograph demonstrates sclerotic focus within the lower thoracic vertebral body, adjacent to the pedicle. There is characteristic nonaggressive appearance with sclerotic density and brush-like margins that suggest…
