title: Breast as an unusual site of metastasis- series of 3 cases and review of literature.
abstract: Background and objectives Metastasis to the breast from extra mammary sites is uncommon with an incidence ranging from 1.2 to 2 % in clinical reports. Approximately 300 cases of breast metastasis from extra mammary sites have been reported, mostly in small series or as a single case report. Gastrointestinal adenocarcinoma metastasising to the breast is also very rare and only 30 cases have been reported in the literature. Metastatic deposits within the breast may be difficult to distinguish from primary breast carcinoma. Radiological features and immunohistochemistry especially for steroid hormone receptors (ER/PR) and expression of gross cystic disease fluid protein (GCDFP) and presence of other immunohistochemistry protein factors in breast metastasis which are specific to primary site may be helpful in differentiating these two conditions. Materials and methods In this series of 3 cases of breast as an unusual site of metastasis, we present different cases of adenocarcinoma of stomach, sigmoid colon and kidney with metastasis to the breast and discuss the differential diagnosis and management plans. Conclusion In conclusion, secondary tumors to the breast are rare and thus differentiating primary tumors from metastatic breast carcinoma is important for rational and optimum therapy and avoidance of unnecessary radical surgery. Palpable breast lump without typical radiological signs of primary breast carcinoma in patients with known primary should be suspected of representing metastasis.
authors.affiliation: 39. "Krutika" 3rd Main, 2nd Cross Gururagavendra Nagar J.P. Nagar 7th Phase, Bangalore, Karnataka 560078 India ; Department of General Surgery, Shimoga Institute of Medical Sciences, Shimoga, Karnataka India.
authors.forename: Ashwin K
authors.initials: AK
authors.lastname: Hebbar
authors.affiliation: Department of ENT, Karnataka Institute of Medical Sciences, Hubli, Karnataka India.
authors.forename: K
authors.initials: K
authors.lastname: Shashidhar
authors.affiliation: Department of Surgical Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka India.
authors.forename: Krishna Murthy
authors.initials: KM
authors.lastname: S
authors.affiliation: Department of Surgical Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka India.
authors.forename: Veerendra
authors.initials: V
authors.lastname: Kumar
authors.affiliation: Department of Surgical Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka India.
authors.forename: Ravi
authors.initials: R
authors.lastname: Arjunan
keywords: Adenocarcinoma stomach; Extra mammary metastasis to breast; Renal adenocarcinoma