XXXX of the posterior arch of the atlas: case report and extensive review of the literature.

@entity1 @entity154 @entity135 @entity24966 @entity3799 @entity3061 @entity29986 @entity155 @entity6127
@entity29986 of the posterior arch of the atlas (C1), a developmental failure of chondrogenesis, is a rare @entity154 and may range from partial clefts to total agenesis of the posterior arch. Ossification of the posterior arch usually occurs between the 3rd and 5th years of life. The incidence of @entity6127 of the atlas is between 0.69% and 2.95%. For the evaluation of the @entity1 , cervical lateral plain radiography, 2D or 3D reconstructed CT and MRI are very useful and important tools in initial diagnosis. Surgery is the treatment of choice in symptomatic compression. Excision of the posterior arch is performed. during surgery. After the surgery, @entity1 may be followed up for instability and treated as necessary. A @entity1 , admitted to the emergency department with @entity135 after a traffic accident is presented in this article. @entity24966 was determined after detailed imagining studies and the radiology department consulted. When @entity3799 are found in a young @entity1 , the @entity1 should be evaluated in detail with advanced radiological studies to avoid misinterpretation as fractures, @entity155 , @entity3061 or instability. Consulting a radiologist could help making an accurate diagnosis and deciding on current therapeutic interventions.
