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Figure 6 | Scoliosis

Figure 6

From: Atlanto-axial rotatory fixation in a girl with Spondylocarpotarsal synostosis syndrome

Figure 6

Sagittal CT image reveals anterior displacement of the odontoid process (O) to the posterior aspect of the anterior arch of C1. Note the Wachenheim clivus line* (a), which is drawn along the posterior aspect of the clivus toward the odontoid process-in our patient – the line does not intersect and is not tangential to the odontoid process-this confirms the abnormality and indicates the existence of occipito-atlas subluxation. The Chamberlain's line **(b) showed no associated basilar invagination.

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