Most common cause of chronic retropharyngeal abscess
CHRONIC RETROPHARYNGEAL ABSCESS (PREVEEBRAL ABSCESS) AETIOLOGY :- It is tubercular in nature and is the result of (i) caries of cervical spine or (ii) tuberculous infection of retropharyngeal lymph nodes secondary to tuberculosis of deep cervical nodes. Ref:- Dhingra; pg num:-266,267
Infective foreign body
Caries teeth
Caries of cervical spine
Suppuration of retropharyngeal lymph node
Pharynx