title: Rectal carcinoma metastatic to the male breast after 7 years: case report.
abstract: BACKGROUND
  Colorectal cancer metastasis to a mammary location is very rare.
  
  
  METHODS
  A 38-year-old male, who had undergone anterior resection of an advanced rectal carcinoma 7 years earlier, presented with a right mammary mass. Core needle biopsy of the mass indicated cytology consistent with breast adenocarcinoma. After neoadjuvant chemotherapy and modified radical mastectomy, pathology identified the mass as rectal carcinoma.
  
  
  CONCLUSIONS
  The authors highlight the difficulty of making an accurate diagnosis of rectal cancer metastasis to the breast of a male.
authors: Department of Vascular and Endocrine Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, P.R. China.
authors: Ting
authors: T
authors: Wang
authors: Yong-Gang
authors: YG
authors: Lv
authors: Qing-Guo
authors: QG
authors: Yan
authors: Shi-Fang
authors: SF
authors: Yuan
authors: Rui
authors: R
authors: Ling
authors: Jiang-Hao
authors: JH
authors: Chen
authors: Lin
authors: L
authors: Chen
authors: Jun
authors: J
authors: Yi
authors: Ling
authors: L
authors: Wang
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy / Q000473:pathology* / Q000556:secondary* / Q000601:surgery; D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001707:Biopsy, Needle; D001940:Breast / Q000473:pathology; D018567:Breast Neoplasms, Male / Q000188:drug therapy / Q000473:pathology* / Q000556:secondary* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D015409:Mastectomy, Radical; D020360:Neoadjuvant Therapy; D012004:Rectal Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery