title: CT and MRI findings of carcinoma showing thymus-like differentiation.
abstract: Carcinoma showing thymus-like differentiation (CASTLE) is a rare tumor that occurs in the soft tissue of the neck or in the thyroid gland. We report a case of CASTLE in a 54-year-old man presenting with hoarseness. Computed tomography (CT) and magnetic resonance imaging (MRI) showed a mass enclosing the right carotid artery with the shape of lobulation and invasion to the trachea. The mass was hypointense on T1-weighted imaging and, on T2-weighted imaging, showed a hyperintense periphery with isointense center relative to muscle. In dynamic MRI, the mass revealed gradual but slight heterogeneous enhancement from the periphery. Diagnosis was confirmed by histopathology.
authors.affiliation: Department of Radiology, Kanazawa University School of Medicine, 13-1 Takara-machi, Kanazawa 920-8641, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Yoneda
authors.forename: Osamu
authors.initials: O
authors.lastname: Matsui
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Gabata
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Minato
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Hirokawa
mesh_terms: D002277:Carcinoma / Q000175:diagnosis*; D006258:Head and Neck Neoplasms / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013953:Thymus Neoplasms / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed