Inflammatory Retropharyngeal abscess (bacterial)
Pott's disease (tuberculosis)
Hydatid cyst
Miscellaneous Hemangioma
Thyroid cyst
Papillary carcinoma of thyroid
Parathyroid cyst
3rd Branchial cyst [5]
Ectopic thymus [6]
Cystic lymphangioma
Bronchogenic cysts
Table 1: Causes of retropharyngeal cysts.