title: Radiological images of keratocystoma: a rare tumor of the parotid gland.
abstract: A 34-year-old man found a mildly tender preauricular mass. Ultrasonography revealed an anechoic mass in the superficial lobe of the parotid gland. Magnetic resonance imaging showed thin ring-like contrast enhancement and homogenously high intensity on T2-weighted images. The mass was resected due to its rapid growth. The cystic lesion contained keratine-like material and a stratified squamous epithelium without granular layers, which was consistent with keratocystoma.
authors.affiliation: Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA.
authors.forename: Kenji
authors.initials: K
authors.lastname: Hirata
authors.affiliation: Department of Radiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Fujima
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors.forename: Takatsugu
authors.initials: T
authors.lastname: Mizumachi
authors.affiliation: Department of Pathology, University of California Los Angeles, CA, USA ; American Specialty Laboratory, Inc., Canoga Park, CA, USA.
authors.forename: Bizhan
authors.initials: B
authors.lastname: Bandarchi
authors.affiliation: Roesler Facial Plastic Surgery and ENT, Tarzana, CA, USA.
authors.forename: John M
authors.initials: JM
authors.lastname: Roesler
keywords: Keratocystoma; magnetic resonance imaging (MRI); parotid gland tumor; ultrasonography