title: Metastatic thymoma of the breast.
abstract: Breast metastasis from nonmammary malignant neoplasms is uncommon, and it accounts for approximately 2% of all breast tumors. Distant metastasis of thymoma is very rare, and especially to extrathorcic areas. We report a female who had a metastatic thymoma in her breast 20 years after undergoing resection for a non-invasive thymoma. She presented with a palpable mass in her left breast. Mammography and ultrasonogram showed a lobular mass at the anterior glandular portion. Histological examination after surgical excision revealed a metastatic thymoma.
authors.affiliation: Department of Radiology and the Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Kangnam-Gu, Seoul, Korea.
authors.forename: Sung Mok
authors.initials: SM
authors.lastname: Kim
authors.forename: Eun Young
authors.initials: EY
authors.lastname: Ko
authors.forename: Boo Kyung
authors.initials: BK
authors.lastname: Han
authors.forename: Jung Hee
authors.initials: JH
authors.lastname: Shin
authors.forename: Seok Seon
authors.initials: SS
authors.lastname: Kang
authors.forename: Seok Jin
authors.initials: SJ
authors.lastname: Nam
authors.forename: Eun Yoon
authors.initials: EY
authors.lastname: Cho
mesh_terms: D001943:Breast Neoplasms / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D013945:Thymoma / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D013953:Thymus Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016217:Ultrasonography, Mammary