ABSTRACT

Renal cell carcinoma (RCC) has a high propensity for early metastasis and evidence of metastases is present in about one third of patients at presentation. RCC frequently manifests first as an osseous metastasis from a clinically occult primary tumor. Osseous metastasis occurs in 20%-60% of patients with RCC. Most of the metastases are aggressive lytic lesions, usually with cortical erosion or destruction. The most common metastasis from RCC is a lytic destructive lesion in the pelvis or sacrum. CalvarÝum is an unusual site of RCC metastasis. The first case of calvarial RCC metastasis has been reported in 1960 by Melicov and Uson. The best treatment for a single metastasis is surgical excision. We report a case RCC with calvaryal metastasis revealed before the primary tumor become apparent.