Metastatic Clear Cell Renal Cell Carcinoma Presenting as Acute Appendicitis

Renal cell carcinoma (RCC) is a malignant tumor arising from the epithelial cells of kidney tubules. It may metastasize to many sites; however, metastasis of RCC to the appendix is very rare. Renal cell carcinomas usually metastasize to the lungs, lymph nodes, bones, or liver. Metastasis usually occurs within three years after radical nephrectomy; however, there is evidence of RCC metastasis many years following nephrectomy.