  Straightening of the normal cervical lordosis is compatible with patient position versus muscle spasms.  No fracture or subluxation is seen.  Anterior and posterior osteophyte formation is seen at C5-C6.  No abnormal anterior cervical soft tissue swelling is seen.  No spinal compression is noted.  The atlanto-dens interval is normal.  There is a large retention cyst versus polyp within the right maxillary sinus.