2020-02-132020-02-132010ELIAS, Larissa Santana Arantes  et al. Epidermoid cyst: highlights on diagnosis and magnetic ressonance imaging features. Revista Odonto Ciência, Porto Alegre, v. 25, n. 2, p. 204-207, 2010.e- 1980-6523http://repositorio.bc.ufg.br/handle/ri/18675Purpose: Epidermoid and dermoid cysts are extremely rare developmental cysts of a benign nature, which may occur anywhere in the body, although about 7% are found in the head and neck. This article reports a clinical case of a patient who had an epidermoid cyst and its magnetic resonance imaging (MRI) features. Case report: This case discusses an epidermoid cyst in a 36-year-old woman complaining about speech difficulty. Clinical examination revealed an extensive swelling on the floor of the mouth. MRI findings showed a cystic homogenous lesion located underneath the mylohyoid muscle which was removed by surgery. Histological examination of the mass confirmed the diagnosis of an epidermoid cyst. Conclusion: We concluded that MRI was considered useful for a more accurate diagnosis prior to treatment.engAcesso AbertoEpidermoid cystDifferential diagnosisDermoid cystMagnetic resonance imagesCisto epidermóideDiagnóstico diferencialCisto dermóideImagens por ressonância magnéticaArtigo10.1590/S1980-65232010000200019