Renal epidermoid cyst: A case report.

A 56-year-old male patient with no significant clinical history manifested lumbar pain, macroscopic hematuria and dysuria. Radiology images found a renal mass in the upper right pole at the pyelocaliceal level. A partial nephrectomy was performed to resect the tumor, and histology revealed the diagnosis of a renal epidermoid cyst, which is an infrequent lesion with a benign biological behavior. Its etiology is still controversial, but its clinical course is satisfactory after complete resection of the lesion.