Bilateral non-serous cysts of eustachian tubes
Incidental finding in a patient with chronic headaches. Recurrent otitis media.
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Large bilateral epipharyngeal cysts. Right chronic mastoiditis probably from blockage of the Eustachian tube.
The fluid signal within the cysts is not suppressed on fluid attenuated IR images. This is a typical finding in a lesion containing cholesterol or protein. The cysts are also slightly hyperintense on T1 when compared with CSF. Dermoid cysts have been described in this region1, as well as various types of serous cysts2.
- Kollias SS, Ball WS, Prenger EC et-al. Dermoids of the eustachian tube: CT and MR findings with histologic correlation. AJNR Am J Neuroradiol. 1995;16 (4): 663-8. AJNR Am J Neuroradiol (citation) - Pubmed citation
- Ben salem D, Duvillard C, Assous D et-al. Imaging of nasopharyngeal cysts and bursae. Eur Radiol. 2006;16 (10): 2249-58. doi:10.1007/s00330-006-0238-x - Pubmed citation