The incidence of kidney cancer is also considered relatively high, with over 95% of kidney tumors being malignant, and benign tumors being less common. The distinction between benign and malignant tumors is determined by their symptomatic expression and growth patterns, and they have different impacts on the body. Generally, benign tumors grow expansively or exophytically, have a slower growth rate, and have clearer boundaries with often a capsule surrounding them. The texture and color of the tumor are close to that of normal tissues. Malignant tumors, on the other hand, exhibit the opposite characteristics.