title: Intramuscular lipoma in the masseter muscle: a case report.
abstract: This is the first report to our knowledge of an intramuscular lipoma that arose in the masseter muscle. Excision biopsy under general anaesthesia showed that the mass could easily be separated from the surrounding soft tissues on the lateral side, but was firmly adherent to the muscle on the medial side, so complete excision required resection of part of the masseter. Histopathological examination showed that it was an intramuscular lipoma. Two years and 6 months postoperatively there was no evidence of recurrence.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Syounai Amarume Hospital, Yamagata, Japan.
authors.forename: Go
authors.initials: G
authors.lastname: Tsumuraya
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University, Yokohama, Japan. Electronic address: yamada-hi@tsurumi-u.ac.jp.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yamada
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University, Yokohama, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Shimizu
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University, Yokohama, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Hamada
mesh_terms: D017667:Adipocytes / Q000473:pathology; D001706:Biopsy / Q000379:methods; D002610:Cheek / Q000473:pathology; D005500:Follow-Up Studies; D006801:Humans; D008067:Lipoma / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008406:Masseter Muscle / Q000473:pathology*; D008875:Middle Aged; D018485:Muscle Fibers, Skeletal / Q000473:pathology; D019042:Muscle Neoplasms / Q000175:diagnosis*
keywords: Head and neck; Intramuscular lipoma; Masseter muscle