title: Metastatic neoplasm presenting as primary cancer of the breast: case reports.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology / Q000556:secondary*; D001940:Breast / Q000473:pathology; D001943:Breast Neoplasms / Q000473:pathology / Q000556:secondary*; D018288:Carcinoma, Small Cell / Q000473:pathology / Q000556:secondary*; D005260:Female; D006801:Humans; D008168:Lung / Q000473:pathology; D008175:Lung Neoplasms / Q000473:pathology*; D008875:Middle Aged