MRI
Axial T1
Axial T1 C+ fat sat
Axial T2
MRI through the nasopharynx demonstrates a small well circumscribed cystic region nestled between the longus colli muscles deep to the nasopharyngeal mucosa.
Centrally the lesion is of high T2 signal and low T1 signal and demonstrates only peripheral enhancement similar to the nasopharyngeal mucosa.
Features are consistent with Thornwaldt cyst.