Bilateral breast metastases from a renal carcinoma

Metastatic involvement of the breast is rare. The commonest cause is spread from a contralateral breast carcinoma. However, metastatic malignant melanoma, lymphoma and lung carcinoma have all been reported sporadically in the literature. Renal carcinoma is well recognised for its protean clinical manifestations ranging from loin pain, haematuria and an abdominal mass to less obvious metastatic effects such as pathological fracture of a long bone or one of a variety of associated paraneoplastic syndromes. We present a case of a renal carcinoma presenting with bilateral breast masses with literature review, and discuss the efficacy of the standard gamut of investigations in a breast mass of non-primary origin.