Atlantooccipital and Atlantoaxial SeparationNeuroradiology: Key Differential Diagnoses and Clinical QuestionsDecember 13, 2022FRCR Reading List, Neurological Imaging CASE A Sagittal T2 magnetic resonance imaging shows the anterior atlantooccipital ligament ( white arrow ), anterior arch of C1 ( black arrow ), dens ( magenta arrow ), apical ligament ( blue arrow ), tectorial membrane ( green arrow ), basion ( yellow arrow ), and opisthion ( red arrow ). Open full size image CASE B Flexion and extension lateral radiographs show normal alignment on the extension view but significant anterior translation of the atlas with respect to the dens on the flexion view. Open full size image CASE C Sagittal computed tomography image shows superior subluxation of the dens through the foramen magnum. Erosive changes also are affecting the dens. Open full size image Diagnosis Case A Normal anatomy Case B Atlantoaxial instability You're Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here Previous Post Ecchordosis Physaliphora Versus Chordoma Next Post Basilar Invagination and Platybasia Related Posts Basilar Invagination and Platybasia Neuroradiology: Key Differential Diagnoses and Clinical Questions
Basilar Invagination and Platybasia Neuroradiology: Key Differential Diagnoses and Clinical Questions