title: Extensive epidermoid cyst of the submental region.
abstract: Epidermoid cysts are malformations that are rarely observed in the submental region. Imaging has an important role in surgical planning according to the size and location of the cyst in relation to geniohyoid and mylohyoid muscles. This article reports the case of a 15-year-old female patient complaining of submental swelling. The differential diagnosis included infection, tumor, ranula, and abnormalities during embryonic development. The lesion was surgically excised using an extra-oral approach. The histopathological examination revealed a cyst wall lined with stratified squamous epithelium with the presence of several horny scales consistent with the diagnosis of an epidermoid cyst. No recurrences were found after 1 year of follow-up.
authors.affiliation: Division of Dentistry - Oral and Maxillofacial Clinical Surgery - Brazilian Air Force Hospital, São Paulo/SP - Brazil .
authors.forename: Estevam Rubens
authors.initials: ER
authors.lastname: Utumi
authors.affiliation: Stomatology Department - School of Dentistry - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Juliane Pirágine
authors.initials: JP
authors.lastname: Araujo
authors.affiliation: Division of Dentistry - Oral and Maxillofacial Clinical Surgery - Brazilian Air Force Hospital, São Paulo/SP - Brazil .
authors.forename: Irineu Gregnanin
authors.initials: IG
authors.lastname: Pedron
authors.affiliation: Department of Oral and Maxillofacial Surgery - Hospital das Clínicas - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Frederico
authors.initials: F
authors.lastname: Yonezaki
authors.affiliation: Department of Oral and Maxillofacial Surgery - Hospital das Clínicas - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: Gustavo Grothe
authors.initials: GG
authors.lastname: Machado
authors.affiliation: Department of Oral and Maxillofacial Surgery - Hospital das Clínicas - Universidade de São Paulo, São Paulo/SP - Brazil .
authors.forename: André Caroli
authors.initials: AC
authors.lastname: Rocha
keywords: Cysts; Epidermal cyst; Pathology, Oral