title: Oncocytic sialolipoma of the submandibular gland with sebaceous differentiation: a new pathological entity.
abstract: METHODS
  We report the case of an oncocytic sialolipoma of the submandibular gland with sebaceous differentiation in a 73-year-old man. The initial symptom was a right submandibular painless mass. Ultrasonography showed a hypoechoic oval mass posterior to the submandibular gland. The tumorectomy was performed with preservation of the salivary gland. The tumor was composed of mature adipose tissue surrounded by a thin fibrous capsule, multiple nodules of oncocytes, normal ductal-acinar units with focal ductal sebaceous differentiation.
  
  
  CONCLUSIONS
  We reviewed literature of the reported cases of mixed tumors of the salivary glands composed of mature adipose tissue with oncocytosis, salivary ducts, and acini with sebaceous differentiation.
  
  
  CONCLUSIONS
  Sialolipoma and lipoadenoma with or without oncocytosis and/or sebaceous differentiation should be considered organ-specific tumors with a distinct histological appearance and specific terminology.
authors.affiliation: Institute of Anatomic Pathology, S. Maria del Carmine Hospital, Rovereto (TN), Italy.
authors.forename: Teresa
authors.initials: T
authors.lastname: Pusiol
authors.forename: Ilaria
authors.initials: I
authors.lastname: Franceschetti
authors.forename: Michele
authors.initials: M
authors.lastname: Scialpi
authors.forename: Irene
authors.initials: I
authors.lastname: Piscioli
mesh_terms: D000368:Aged; D006651:Histocytochemistry; D006801:Humans; D008067:Lipoma / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D008297:Male; D024862:Oxyphil Cells / Q000166:cytology*; D013363:Submandibular Gland / Q000000981:diagnostic imaging / Q000473:pathology; D013365:Submandibular Gland Neoplasms / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D014463:Ultrasonography