title: Lymphoepithelial carcinoma in the maxillary sinus: a case report.
abstract: BACKGROUND
  Lymphoepithelial carcinoma of the maxillary sinus is a very rare malignancy and it can be difficult to make a pre-operative diagnosis.
  
  
  METHODS
  A 72-year-old Caucasian woman presented to our facility with an isolated right-side epistaxis that had been present for three months, with the results of a computed tomography scan showing a soft tissue mass in the right maxillary sinus with an impacted tooth. The results of a transnasal endoscopic biopsy were compatible with a lymphoepithelial carcinoma, following which our patient underwent a radical excision of the mass. The final histology results revealed lymphoepithelial carcinoma of the maxillary sinus with negative assays for Epstein-Barr virus. Our patient was given post-operative external radiotherapy and has remained disease-free at three-year follow-up.
  
  
  CONCLUSIONS
  This report details the diagnosis and management of a case of lymphoepithelial carcinoma of the maxillary sinus, which is a very rare malignant tumor with very little mention in the literature. Only a strong suspicion with systematic use of various patho-immunological tests helps to arrive at a definitive diagnosis by excluding other better-known tumors.
authors.affiliation: Department of ORL and Head and Neck surgery, CHUV, Lausanne, Switzerland. Kishore.Sandu@hopitalvs.ch.
authors.forename: Darouichi
authors.initials: D
authors.lastname: Mohammed
authors.forename: Alshammari
authors.initials: A
authors.lastname: Jaber
authors.forename: Monnier
authors.initials: M
authors.lastname: Philippe
authors.forename: Sandu
authors.initials: S
authors.lastname: Kishore