title: Malignant phaeochromocytoma metastasising to the breast.
abstract: BACKGROUND
  Nearly one-quarter of metastatic tumours in the breast are from an occult extramammary tumour, usually a lung carcinoma.
  
  
  OBJECTIVE
  To report on a patient with a history of metastatic malignant phaeochromocytoma and a breast mass.
  
  
  RESULTS
  A 54-year-old female presented with a right breast mass. At the age of 32, she had presented with a phaeochromocytoma. The staining of the breast mass was comparable with that of her original adrenal tumour.
  
  
  CONCLUSIONS
  This is the first published case of a phaeochromocytoma metastasising to the breast, and demonstrates the challenge that extramammary tumours in the breast can pose for the pathologist.
authors.affiliation: Department of Surgery, Mater Misericordiae Hospital, Dublin, Ireland.
authors.forename: C
authors.initials: C
authors.lastname: Shaw
authors.forename: D M
authors.initials: DM
authors.lastname: O'Hanlon
authors.forename: C
authors.initials: C
authors.lastname: O'Keane
authors.forename: M J
authors.initials: MJ
authors.lastname: Kerin
mesh_terms: D000310:Adrenal Gland Neoplasms / Q000473:pathology*; D001943:Breast Neoplasms / Q000556:secondary*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010673:Pheochromocytoma / Q000473:pathology / Q000556:secondary*