Orbital tumor from renal cell carcinoma

Orbital tumors are rare. Age specific incidence of primary malignant orbital tumor is approximately 2 per 1 million population until the 6th decade, 4 per 1 million in those older than 60 and 10 per 1 million in those older than 80 years. Approximately 1-13 percent of all orbital tumors are metastatic in nature. The most common primary cancers that metastasize to the orbits are breast, prostate gland and lung. In a series of 100 patients with orbital metastasis, only 5 patients had primary cancer from the kidney. We report a case of an orbital tumor which turned out to be a metastasis due to a renal cell carcinoma from the contralateral kidney. (Author)