title: Differentiating HIV-1 parotid cysts from papillary cystadenoma lymphomatosum.
abstract: BACKGROUND
  Patients with parotid cystic lesions may first be seen in the dental office. These conditions most often represent either papillary cystadenoma lymphomatosum, or PCL, or lymphoepithelial cysts associated with human immunodeficiency virus, or HIV, disease. The authors present a case report to illustrate the differential diagnosis.
  
  
  METHODS
  PCL represents a benign, usually unilateral, circumscribed parotid tumor with cystic elements. HIV-associated lymphoepithelial cysts of the parotid gland usually are seen bilaterally, create cosmetic concerns and are hallmarked by an associated cervical lymphadenopathy. Therapy for PCL demands surgical excision, while patients with HIV-associated lymphoepithelial cysts may be treated with antiviral therapy and undergo periodic monitoring by a physician.
  
  
  CONCLUSIONS
  As a member of the health care team, the dentist must be familiar with head and neck swellings. Early clinical recognition of parotid swellings leads to successful treatment.
authors.affiliation: Columbia University School of Dental and Oral Surgery, New York-Presbyterian Hospital, N.Y. 10032, USA.
authors.forename: L
authors.initials: L
authors.lastname: Mandel
authors.forename: A
authors.initials: A
authors.lastname: Tomkoria
mesh_terms: D000386:AIDS-Related Complex / Q000000981:diagnostic imaging*; D000235:Adenolymphoma / Q000175:diagnosis*; D018414:CD8-Positive T-Lymphocytes; D003560:Cysts / Q000000981:diagnostic imaging* / Q000209:etiology; D003937:Diagnosis, Differential; D006679:HIV Seropositivity / Q000821:virology; D015497:HIV-1; D006801:Humans; D008218:Lymphocytosis / Q000000981:diagnostic imaging* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D010305:Parotid Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D010307:Parotid Neoplasms / Q000175:diagnosis*; D011859:Radiography