Kidney cavernous hemangiomas are rare. Renal cavernous hemangioma complicated by secondary chronic thrombosis of the renal vein has not been previously reported. A 17-year-old boy was initially diagnosed with a renal mass with tumor thrombosis. Radical nephrectomy was performed, and the pathologic examination revealed a renal cavernous hemangioma with chronic renal vein thrombosis. We also reviewed the previous diagnostic and treatment methods described in previous reports.
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