Lymphangitic spread of invasive lobular carcinoma to the contralateral breast.

Breast cancer typically spreads primarily to regional lymph nodes and subsequently to distant sites via hematogenous routes. Occasionally metastasis can occur through lymphangitic spread, usually to the lungs, resulting in lymphangitic carcinomatosis. Lymphangitic spread of several malignancies have been reported at other sites in the body with varying degrees of clinical significance. In this case report, we describe a rare case of lymphangitic spread of invasive lobular carcinoma to the contralateral breast identified on imaging as significant background enhancement without a discrete suspicious mass.