Trastuzumab is routinely used monoclonal antibody in the treatment of several cancers with high effectiveness, but its use is
associated with cardiac toxicity which usually responds to cessation of the drug therapy. We present an unusual case in 40 year old
female being treated for breast carcinoma with trastuzumab developed acute cardiac toxicity in form of cardiomyopathy without
atrial fibrillation, who developed stroke.
Keywords: Trastuzumab, Toxicity, Cardiomyopathy, Cerebellar stroke