The most common lesion is the benign lymphoepithelial cyst
Aspirates of lymphoepithelial cyst
reveal squamous cells, keratinous materials, lymphocytes, histiocytes, and cholesterol crystals.
Less common branchial cleft anomalies include a first BCC, or a parotid lymphoepithelial cyst
, arising from a tract extending from the external auditory canal through the parotid to the submandibular triangle (Figure 5).
In our series of cystic lesions, the combination of thick extracellular material (which in retrospect most likely represented keratinous debris) and gastrointestinal contamination led to the false impression of mucus-producing cystic neoplasm with an aspirate from a lymphoepithelial cyst
The combination of cystic lesion with a predominant lymphoid component arising in a background of lymphocytic thyroiditis can be mistaken for a benign lymphoepithelial cyst
Islands of squamous metaplasia may be seen in the background, along with isolated lymphoepithelial cysts
Amy Chadburn, MD, Anmaar Abdul-Nabi, MD, Bryan Teruya, MD, and Amy Lo, MD, address benign lymphoid proliferations encountered in patients with human immunodeficiency virus (HIV) infection, including progressive HIV-associated lymphadenopathy, benign lymphoepithelial cysts
, and multicentric Castleman disease, as well as the different types of HIV-associated lymphomas.
associated with HIV infection are distinguished from Sjogren's syndrome by the associated diffuse cervical lymphadenopathy.
5,8,10,11,29,31) Incomplete obliteration of the thymopharyngeal duct has also been proposed as a source of lateral neck lymphoepithelial cysts
4,6) The clinicoradiographic differential diagnosis of FBCAs includes benign lymphoepithelial cysts
, venolymphatic malformations, primary parotid neoplasms, and suppurative adenopathy or abscess.
With HIV nephropathy, lymphoepithelial cysts
are a part of the spectrum of the HIV/acquired immunodeficiency syndrome (AIDS)-related complex syndrome.
Histologic findings on examination of lymphoepithelial cysts
are microscopically similar to those of branchial cleft cysts, although some different patterns are seen.