title: MRI of anterior mediastinal tumors.
abstract: To compare the abilities of MRI (magnetic resonance imaging) and CT to provide information about anterior mediastinal tumors, we retrospectively evaluated the MR (n = 28) and CT images (n = 25) of patients with anterior mediastinal tumors. T1-weighted and T2-weighted images were obtained with spin echo sequences using cardiac gating. Six of 12 thymomas and seven of nine teratomas showed characteristic findings by MRI, while four of the 10 thymomas and five of the eight teratomas were correctly diagnosed by CT. The other tumors did not show a characteristic MR appearance. All nine malignant tumors were correctly diagnosed as malignant lesions on MR images, while one false positive case and one false negative case were recorded on CT images. We conclude that MRI and CT provide nearly the same information for the evaluation of anterior mediastinal tumors. However, in some cases, only MRI can provide information about malignancy or a specific diagnosis.
authors.affiliation: Department of Radiology, Osaka University Medical School, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Ikezoe
authors.forename: N
authors.initials: N
authors.lastname: Takeuchi
authors.forename: T
authors.initials: T
authors.lastname: Johkoh
authors.forename: N
authors.initials: N
authors.lastname: Kohno
authors.forename: S
authors.initials: S
authors.lastname: Takashima
authors.forename: N
authors.initials: N
authors.lastname: Tomiyama
authors.forename: J
authors.initials: J
authors.lastname: Arisawa
authors.forename: H
authors.initials: H
authors.lastname: Yamagami
authors.forename: H
authors.initials: H
authors.lastname: Yoshioka
authors.forename: T
authors.initials: T
authors.lastname: Higashihara
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002276:Carcinoid Tumor / Q000175:diagnosis / Q000000981:diagnostic imaging; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D008476:Mediastinal Cyst / Q000175:diagnosis / Q000000981:diagnostic imaging; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008875:Middle Aged; D013724:Teratoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D013945:Thymoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D013953:Thymus Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed