Axial contrast-enhanced CT scan through the parotid tail demonstrates a dominant cyst (straight arrow). Axial contrast-enhanced CT scan through the parotid.

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Presentation transcript:

Axial contrast-enhanced CT scan through the parotid tail demonstrates a dominant cyst (straight arrow). Axial contrast-enhanced CT scan through the parotid tail demonstrates a dominant cyst (straight arrow). Nodular lymphoid aggregates (curved arrow) in the contralateral gland should suggest a systemic process, in this case, Sjögren disease. The appearance is typical of Sjögren disease or HIV lymphoepithelial lesion, which cannot be distinguished on a histopathologic basis. (Reprinted with permission from reference 1.)‏ Bronwyn E. Hamilton et al. AJNR Am J Neuroradiol 2003;24:1757-1764 ©2003 by American Society of Neuroradiology