Most of MFH arising in the kidney are storiform-pleomorphic type as seen here. Distinction from sarcomatoid renal cell carcinoma may be difficult in some cases.

• 本肿瘤瘤体大并向周围浸润生长，常为多形性、编织型及炎症型。前者较难与肉瘤样肾细胞癌区别。