title: Computed tomography diagnosis of primary thyroid teratoma.
abstract: Teratomas occur mainly in the gonads, and rarely in the thyroid. They are common in reproductive age women. Teratomas in the thyroid occur mainly in neonates and are often benign. Here we report a case of primary benign teratoma of the thyroid gland in a 15-year-old female, which was accurately diagnosed by computed tomography before surgery. The tumor was a well-defined cystic mass in the right thyroid region, with a fat-containing nodule in the cystic tumor causing displacement of the trachea. The patient was treated with right subtotal thyroidectomy and no recurrence was noted during 2 years' follow-up. Demonstration of the fat component within a well-defined cystic mass in the thyroid region allows accurate diagnosis of teratoma, localization of the tumor extent before operation, and adequate treatment.
authors.affiliation: Department of Medical Imaging, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei.
authors.forename: Bang-Bin
authors.initials: BB
authors.lastname: Chen
authors.forename: Chi-Chuan
authors.initials: CC
authors.lastname: Yeh
authors.forename: Tien-Chun
authors.initials: TC
authors.lastname: Chang
authors.forename: Cheng-Hsiang
authors.initials: CH
authors.lastname: Hsiao
authors.forename: Kuan-Yuan
authors.initials: KY
authors.lastname: Chen
authors.forename: Kao-Lang
authors.initials: KL
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D013724:Teratoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed