Primary renal sarcomas of the kidney in adults are unusual, accounting for approximately 1% to 3% of all primary renal malignancies.

• 摘要肾脏恶性肿瘤以肾细胞癌及肾盂移形上皮细胞癌为主，肾脏肉瘤约只占所有肾脏恶性肿瘤的百分之一至三。