A<unk>  is a<unk>  caused by an obstruction of a duct, usually belonging to the parotid gland or a minor salivary gland.
MRI demonstrating a right nasopharyngeal<unk> 
T2
T2
T2
T2
Mucous retention cyst
Nabothian cyst
Sebaceous cysts
Gartner duct cyst
Blood cyst
Hidrocystoma
Ganglion cyst
Sebaceous cyst