Kidney cancer is one of the types included in the simplified classification of renal tumors. Generally, kidney cancer includes renal cell carcinoma, renal adenoma, adrenal adenoma, and papillary cystadenocarcinoma, which are commonly encompassed within the scope of kidney cancer. Simply put, kidney cancer is a category in clinical diagnostic examinations. Renal cell carcinoma belongs to the pathological classification of renal tumors, and typically includes conventional types of renal cell carcinoma, such as the commonly mentioned clear cell carcinoma, which is the most common type. Additionally, chromophobe renal cell carcinoma and collecting duct carcinoma are also types of renal cell carcinoma.