Mammary Carcinoma Metastasizing to Renal Cell Carcinoma: A Rare Example of Tumor-to-Tumor Metastasis

Vidhya Dharshini Murugesan, Saroja Devi Geetha, Neha Seth, Philip Ort, Kasturi Das, Department of Pathology and Laboratory Medicine, North Shore University Hospital and Long Island Jewish Medical Center, Donald and Barbara Zucker School of Medicine at Hofstra, Northwell Health

International Journal of Surgical Pathology

Published online on November 18, 2025

Abstract

International Journal of Surgical Pathology, Volume 34, Issue 3, Page 771-775, May 2026.
IntroductionSimultaneous occurrence of multiple primary cancers is rare, and even rarer is the phenomenon of one cancer metastasizing to another. Here, we present a mammary carcinoma and renal cell carcinoma (RCC) diagnosed concurrently while presenting ...