title: [Parotid retention cyst revealing a mucoepidermoid carcinoma].
abstract: OBJECTIVE
  To describe a case of mucoepidermoid carcinoma of the parotid gland that caused obstruction of a salivary gland duct and manifested as a parotid retention cyst.
  
  
  METHODS
  A 21-year-old woman presented with a 5-cm cystic swelling in her left parotid region. Ultrasound examination and a computerized tomography scan showed a clearly outlined parotid cyst. Through a conventional parotidectomy incision, the cyst was excised with parotid gland tissue around the lesion. The patient had an uncomplicated recovery.
  
  
  RESULTS
  Histopathological examination of the resected parotidectomy material showed a parotid retention cyst and a mucoepidermoid carcinoma measuring 5mm in diameter.
  
  
  CONCLUSIONS
  Among acquired cysts of the parotid gland, retention cysts are the most frequent. They may be the presenting symptom in patients with occult cancer of the parotid. In this case report, a mucoepidermoid carcinoma played a significant role in the obstruction of a salivary gland duct and caused a parotid retention cyst. Thus, a wide excision of the parotid retention cyst is necessary, as is a careful review of the histology searching for malignant lesion.
authors.affiliation: Service ORL, hôpital universitaire Farhat-Hached, avenue Ibn-Eljazzar, 4000 Sousse, Tunisie.
authors.forename: W
authors.initials: W
authors.lastname: Kermani
authors.forename: M
authors.initials: M
authors.lastname: Belcadhi
authors.forename: R
authors.initials: R
authors.lastname: Mani
authors.forename: M
authors.initials: M
authors.lastname: Abdelkéfi
authors.forename: B
authors.initials: B
authors.lastname: Sriha
authors.forename: K
authors.initials: K
authors.lastname: Bouzouita
mesh_terms: D000328:Adult; D018277:Carcinoma, Mucoepidermoid / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D003560:Cysts / Q000473:pathology*; D005260:Female; D006801:Humans; D010307:Parotid Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014463:Ultrasonography