A durable complete remission between two isolated presentations of metastatic breast cancer, the second with intracardiac disease.

We report a case of a postmenopausal patient with hormone receptor-positive breast cancer who, while receiving tamoxifen, experienced relapse with isolated ovarian metastases 4.5 years after her primary treatment. After resection of her pelvic disease, she commenced anastrozole, and while receiving this, remained disease free for an additional 7.5 years before experiencing relapse again with isolated metastatic disease in an unusual location: intracardiac disease causing superior vena cava obstruction.