title: Salivary gland choristoma in the buccinator muscle: A case report and literature review.
abstract: Salivary gland choristoma (SGCh) is defined as the presence of normal salivary tissue in an abnormal location. It is a rare entity in oral and maxillofacial region and its ethiology is unknown. The typical presentation of salivary gland heterotopia is an asymptomatic mass that may or may not produce saliva. Some examples of ectopic salivary tissue in the pituitary gland, in the lymph nodes, in the middle ear, in the neck, in the jaw, in the thyroid gland, in the mediastinum and in the rectum have been documented in literature. We report the case of a 61-year-old male presented with a bilateral tumorlike mass in the cheek. The mass was painless, of fibrous consistency and had size change with time. The histological diagnosis was salivary gland choristoma in the buccinator muscle. In this article, we will revise the characteristic of salivary gland heterotopias and we present a report case that has not been described in literature: a bilateral choristoma of salivary gland in the buccinator muscle, which should be included in the differential diagnosis of head and neck masses.
  
  
  BACKGROUND
  Choristoma, heterotopias, ectopic tissue, salivary gland, buccinator muscle.
authors.affiliation: DDS. Fellow of the Master of Oral Surgery and Implantology, School of Dentistry, University of Barcelona. Barcelona, Spain.
authors.forename: Dídac
authors.initials: D
authors.lastname: Sotorra-Figuerola
authors.affiliation: DDS, MS. Associate Professor of Oral Surgery and Professor of Master of Oral Surgery and Implantology, School of Dentistry, University of Barcelona. Barcelona, Spain.
authors.forename: Nieves
authors.initials: N
authors.lastname: Almendros-Marqués
authors.affiliation: MD, DDS, MS, PhD. Associate Professor of Oral Surgery and Professor of Master of Oral Surgery and Implantology. Chairman of European Master Degree in Oral Laser Applications (EMDOLA). School of Dentistry, University of Barcelona. Investigator of the IDIBELL institute. Barcelona, Spain.
authors.forename: Antonio-Jesús
authors.initials: AJ
authors.lastname: Espana-Tost
authors.affiliation: DDS, MS, PhD. Professor of Oral Surgery. Director of Master of Oral Surgery and Implantology, School of Dentistry, University of Barcelona. Investigator of the IDIBELL institute. Barcelona, Spain.
authors.forename: Eduard
authors.initials: E
authors.lastname: Valmaseda-Castellón
authors.affiliation: MD, DDS, MS, PhD. Chairman and Professor of Oral and Maxillofacial Surgery. Faculty of Dentistry, University of Barcelona. Director of the Master of Oral Surgery and Implantology (EFHRE International University/FUCSO). Coordinating investigator of the IDIBELL institute. Head of the Department of Oral and Maxillofacial Surgery and Implantology, and the Director of the TMJ Disease and Orofacial Pain Unit. Teknon Medical Center. Barcelona, Spain.
authors.forename: Cosme
authors.initials: C
authors.lastname: Gay-Escoda