AUTHOR=Zhang Letian , Yuan Pei , Cao Qi , Mu Jiali , Ying Jianming , Guo Changyuan 

TITLE=RETRACTED: Case report: A rare case of tumor-to-tumor metastasis: metastatic lobular breast carcinoma to clear cell renal cell carcinoma

JOURNAL=Pathology and Oncology Research

VOLUME=29

YEAR=2023

URL=https://www.por-journal.com/journals/pathology-and-oncology-research/articles/10.3389/pore.2023.1611204

DOI=10.3389/pore.2023.1611204

ISSN=1532-2807

ABSTRACT=<p>Tumor-to-tumor metastasis is a rare phenomenon. Although renal cell carcinoma is the most common recipient tumor, metastatic lobular breast carcinoma to clear cell renal cell carcinoma is even rarer, with only one case reported to date. We present a 66-year-old female patient with an invasive lobular carcinoma history who was admitted to the hospital with a right renal mass. The patient received partial nephrectomy. The final established diagnosis is lobular breast carcinoma metastasizing to clear cell renal cell carcinoma (ccRCC). Thus, although rare, the simultaneous or consecutive find of a renal mass in follow-up should be carefully evaluated, especially in high-risk patients, including women with an advanced breast cancer history, as in this scenario.</p>