A computed tomography (CT) scan is the definitive diagnostic imaging test. X-ray of the neck often (80% of the time) shows swelling of the<unk>  space in affected individuals. If the<unk>  space is more than half of the size of the C2 vertebra, it may indicate<unk> .
Retropharyngeal abscess
Pharyngitis
Parapharyngeal abscess
Streptococcal pharyngitis
Laryngeal cyst
Peritonsillar abscess
Epiglottitis
Nasopharyngeal cyst