title: Spectrum of Extramammary Malignant Neoplasms in the Breast With Radiologic-Pathologic Correlation.
abstract: Although primary breast cancer is the most common malignancy identified by breast imaging, extramammary malignancies may also rarely be encountered. These uncommon lesions may reflect primary neoplasms of nonmammary origin as well as secondary metastatic lesions, and include lymphoma, melanoma, neuroendocrine tumors, gastrointestinal tract malignancies, and angiosarcoma among other entities. Malignant extramammary breast lesions may be encountered during routine mammographic screening, identified during the diagnostic evaluation of a palpable breast abnormality, or may be detected incidentally during imaging of other organs of interest. As such, the radiologist should have familiarity with the appearance of these lesions. This article focuses on a review of several of the most common extramammary metastases to the breast, as well as a few lesions that may develop as either primary or secondary lesions.
authors.affiliation: Department of Radiology, Tufts Medical Center, Boston, MA. Electronic address: skalli@tuftsmedicalcenter.org.
authors.forename: Sirishma
authors.initials: S
authors.lastname: Kalli
authors.affiliation: Department of Radiology, Tufts Medical Center, Boston, MA.
authors.forename: Michael
authors.initials: M
authors.lastname: Lanfranchi
authors.affiliation: Department of Pathology, Tufts Medical Center, Boston, MA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Alexander
authors.affiliation: Department of Radiology, Tufts Medical Center, Boston, MA.
authors.forename: Shital
authors.initials: S
authors.lastname: Makim
authors.affiliation: Avon Comprehensive Breast Center, Massachusetts General Hospital, Boston, MA.
authors.forename: Phoebe E
authors.initials: PE
authors.lastname: Freer
mesh_terms: D001940:Breast / Q000000981:diagnostic imaging; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008327:Mammography / Q000379:methods*