title: Oral epidermoid cyst. A case report.
abstract: BACKGROUND
  Paediatric epidermoid cysts are the rare lesions in the oral cavity, especially under the age of 10 years. They appear in the midline of the mouth usually as a result of residual ectodermal tissue of the first and second branchial arches, which fuse during the third and fourth weeks of intra-uterine life.
  
  
  METHODS
  We present a case of a male patient aged 8 years with swelling of the floor of the mouth, complaining of difficulty in swallowing. The ultrasonographic finding was infected ranula with a differential diagnosis of foregut duplication cyst and dermoid cyst. The cyst was surgically enucleated and was diagnosed as epidermoid cyst after histopathology. At the 18-month follow-up the cyst had not recurred.
authors.affiliation: College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia.
authors.forename: V S
authors.initials: VS
authors.lastname: Nasim
authors.affiliation: Government Dental College, Thiruvananthapuram, Kerala, India.
authors.forename: P
authors.initials: P
authors.lastname: Perumal
mesh_terms: D002648:Child; D003884:Dermoid Cyst / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004814:Epidermal Cyst / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male