Breast metastasis from lung cancer

Breast metastases from cancers of extra-mammary origin are rare. Their frequency is estimated at 0.4 to 6% of all malignant breast tumors. There have been only a few published cases of mammary metastases from bronchopulmonary cancers. Lung cancer metastasis to the breast is an extremely rare clinical presentation, with an incidence of just 0.2-1.3%. To the best of our knowledge, our case represents the first one described in North Africa. Clinicians should take into account the potential diagnosis of metastatic lung cancer when discovering a breast nodule in patients of lung cancer.