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Pravin Salunke, Sameer Futane, Sushant K. Sahoo, Mandeep S. Ghuman and Niranjan Khandelwal

(due to not opening and drilling the facets), lack of rigid construct, or unnecessarily including multiple adjacent segments. In addition to the preoperative diagnosis of anomalous VA, we have attempted to highlight some operative nuances to prevent its injury during CVJ surgery without compromising on the rigid C1–2 (short segment) bone fusion. Methods The study was conducted in the last 2 years. Fifteen patients with congenital atlantoaxial dislocation (AAD) were studied. Preoperative 3D CT angiograms (CTAs) were obtained in all patients. The angiograms

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Pravin Salunke, Sushanta K. Sahoo, Ramesh Doddamani, Chirag K. Ahuja and Kanchan K. Mukherjee

T raumatic atlantoaxial (C1–2) dislocation with Type II odontoid fracture is not uncommon. This usually occurs in the anteroposterior or sagittal plane. However, rotational and lateral C1–2 dislocation is rare. 5 , 9 The C1–2 facets may get locked, making the dislocation irreducible. We describe a rare case of irreducible C1–2 posterior and true lateral dislocation that was managed successfully by a direct posterior approach. The mode of injury and the method used to achieve intraoperative reduction are discussed. Case Report History and

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Pravin Salunke, Sushanta K. Sahoo, Arsikere N. Deepak, Mandeep S. Ghuman and Niranjan K. Khandelwal

T he management of atlantoaxial dislocation (AAD) is challenging due to the neural structures the craniovertebral junction (CVJ) houses and the proximity of the vertebral arteries (VAs). The dislocation may be reducible or irreducible. The reducible AAD can be defined as C1–2 alignment on extension or application of cervical traction. If the dislocation cannot be reduced despite cervical traction, it is labeled as an irreducible AAD. Management becomes difficult with irreducibility of the dislocation. Currently, the focus in treating such patients has

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Arsikere N. Deepak, Pravin Salunke, Sushanta K. Sahoo, Prashant K. Prasad and Niranjan K. Khandelwal

C ongenital atlantoaxial dislocation (AAD) is traditionally classified into irreducible or reducible. The dislocation is commonly seen in the anteroposterior plane (quantified by the atlantodental interval) or the vertical plane (defined as violation of the Chamberlain line, so-called basilar invagination [BI] Type I). 4 , 5 , 8 Often it can be a combination of the 2 planes. Reducible AAD (RAAD) is defined as C1–2 dislocation in either or both planes that reduces completely on extension or on application of traction. The failure to reduce completely