Pleomorphic adenoma of salivary gland and synchronous/metachronous invasive ductal breast cancer: a casual coincidence or a clinical presentation resulting from common genetic events?

Breast and salivary glands have similar morphological and pathological features; however genetic relation between these lesions were not described. In this report we described a small series of biomarkers that developed synchronously or metachronous pleomorphic adenoma of the salivary glands and invasive breast cancer, on which we have tested, by immunohistochemistry, several of bio-markers that may be associated with the pathogenesis of both malignancies. In conclusion, we suggest to better investigate early genetic alterations that could underlie of the synchronous occurrence of these lesions.