Kidney cancer
Renal tumor is the most common tumor in the urinary system, second only to bladder tumor. The vast majority of primary renal tumors are malignant, including renal cell carcinoma, Wilms tumor, and renal pelvic cancer. Benign tumors of the kidney include renal adenoma, angiomyolipoma, hemangioma, lipoma, fibroma, and juxtaglomerular cell tumor. Renal cancer is also called renal cell carcinoma, renal adenocarcinoma, clear cell carcinoma, and renal parenchymal carcinoma. Renal parenchymal carcinoma is an adenocarcinoma derived from renal tubular epithelial cells, 85% of which are clear cell carcinomas, and some are granular cell carcinomas and mixed cell carcinomas.