<unk>  is a relatively rare and benign tumor. The incidence of  is approximately 3% to 7% of solid renal resected tumors and it is more common in male patients. The majority of patients with<unk>  are asymptomatic. Symptoms of<unk>  include hematuria, flank pain, abdominal or flank mass and weight loss. Physical examination of patients with<unk>  is usually normal. An abdominal or flank mass may be palpayed during physical examination. Surgery is the mainstay of treatment for<unk> . Although the nature of<unk>  is benign and the prognosis is excellent, since the definite diagnosis can not be obtained before operation, surgical resection is a choice of treatment.
Renal oncocytoma
Renal cell carcinoma
Renal cyst
Adrenal myelolipoma
Clear cell sarcoma of the kidney
Cystic nephroma
Metanephric adenoma
Adrenal carcinoma