title: Melanoma metastasis to the breast masquerading as fibroadenoma.
abstract: BACKGROUND
  Although primary malignant breast lesions are common, tumor metastasis to the breast is rare. Melanoma metastasis to the breast occurs even more rarely.
  
  
  METHODS
  In the present case report, we describe an adolescent girl with malignant melanoma metastasis to the breast masquerading as fibroadenoma, in which it was impossible to perform differential diagnosis based only on the physical examination and ultrasonographic evaluation. The definitive diagnosis both of the primary and of the metastatic lesion was reached by immunohistochemistry, which revealed positivity to Mart-1 antibody.
  
  
  CONCLUSIONS
  Melanoma metastasizing to the breast is occasionally indistinguishable from a benign lesion at ultrasonographic evaluation. Emphasis should be made on the importance of a correct diagnosis prior to therapeutic management.
authors.affiliation: Department of Gynecology, Federal University of Piauí, Teresina, Piauí, Brazil. beneditoborges@globo.com
authors.forename: Benedito Borges
authors.initials: BB
authors.lastname: da Silva
authors.forename: Raimundo Gerônimo
authors.initials: RG
authors.lastname: da Silva
authors.forename: Pedro Vitor
authors.initials: PV
authors.lastname: Lopes Costa
authors.forename: Cleicilene Gomes
authors.initials: CG
authors.lastname: Pires
authors.forename: Gevina
authors.initials: G
authors.lastname: da Silva Pinheiro
mesh_terms: D000293:Adolescent; D001943:Breast Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000556:secondary* / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D018226:Fibroadenoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D008545:Melanoma / Q000175:diagnosis / Q000556:secondary*; D012878:Skin Neoplasms / Q000473:pathology*; D013848:Thigh; D014463:Ultrasonography