title: Epidermal choristoma arising on the midline gingiva as a congenital epulis: a case report.
abstract: We report an extremely rare case of epidermal choristoma in the midline of the maxillary gingiva. A 2-month-old Japanese boy presented with a polypoid mass in the midline of the maxillary gingiva. The initial clinical diagnosis was congenital epulis. Microscopic examination revealed a granular cell layer and melanin pigmentation within the basal cell layer. Furthermore, sebaceous glands and hair follicles were observed within the connective tissue. The histological diagnosis was therefore epidermal choristoma, based on clinical microscopic observations.
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Sensory and Motor Organs, Faculty of Medicine, Miyazaki University, Kihara 5200, Kiyotake, Miyazaki, Japan. yizumi@fc.miyazaki-u.ac.jp
authors.forename: Izumi
authors.initials: I
authors.lastname: Yoshioka
authors.forename: Kousuke
authors.initials: K
authors.lastname: Marutsuka
authors.forename: Kaori
authors.initials: K
authors.lastname: Igawa
authors.forename: Jyunko
authors.initials: J
authors.lastname: Nagata
authors.forename: Maho
authors.initials: M
authors.lastname: Yoshida
authors.forename: Takashi
authors.initials: T
authors.lastname: Baba
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ichiki
authors.forename: Yudai
authors.initials: Y
authors.lastname: Kondoh
authors.forename: Koichi
authors.initials: K
authors.lastname: Takamori
authors.forename: Koji
authors.initials: K
authors.lastname: Kashima
authors.forename: Sumio
authors.initials: S
authors.lastname: Sakoda
mesh_terms: D002828:Choristoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004848:Epithelium / Q000473:pathology; D005882:Gingival Diseases / Q000175:diagnosis*; D005887:Gingival Neoplasms / Q000151:congenital*; D018859:Hair Follicle / Q000473:pathology; D006801:Humans; D007223:Infant; D008297:Male; D008437:Maxilla / Q000473:pathology; D008543:Melanins / Q000032:analysis; D012627:Sebaceous Glands / Q000473:pathology; D012867:Skin / Q000473:pathology*
chemical_list: D008543:Melanins