https://www.selleckchem.com/pr....oducts/Rapamycin.htm
Primary Breast cancer is the most common malignancy in females but secondary involvement of breast is very rare. The Most common sites of primaries for breast metastasis are breast carcinoma of contra lateral side, Lymphoma and leukaemia. Medullary Thyroid Carcinoma (MTC) itself is rare and commonly metastasises to liver, lung and bones. Secondary breast involvement by MTC is very rare with only few case reports in literature. Clinically and radiographically breast secondaries mimic benign lesions and may cause diagnostic challenges.