Clinical Case: Tumor to Tumor Metastasis. A Rare Phenomenon.

Abstract

Introduction: Tumor to tumor metastasis is very rare with less than 50 cases described in the literature. This article reports a case of breast cancer metastasis in a clear cell renal tumor.

Clinical Case: The case corresponds to a 61-year-old woman with a history of breast cancer, disease free for 23 years. For control, simple and contrasted computed tomography (CT) is requested, observing at the level of the left renal pelvis, a heterogeneous hypercapting nodular image of 2.4 cm, with defined edges, not infiltrating adjacent tissues, due to the location of the lesion, it is subjected to left radical nephrectomy. The pathological examination showed a poorly defined 3 mm metastatic breast carcinoma within a clear renal cell carcinoma of 2.5x2x2cm. This case highlights the importance of a patient's previous history of malignancy, as well as adequate sampling of renal neoplasms.