Kidney tumor may be caused by the following reasons: 1. genetic factors, according to modern clinical reports, kidney cancer has partly genetic tendency and partly familial history of attacks, so genetic factors cannot be excluded; 2. bad habits, such as smoking, drinking, staying up late and overeating, may also cause kidney tumor; 3. according to modern clinical reports, some chronic diseases, such as hypertension, diabetes, obesity and hyperlipidemia, are also related to the occurrence of kidney tumor, According to modern clinical reports, some chronic diseases, such as hypertension, diabetes, obesity, hyperlipidemia, etc., are also related to the occurrence of suprarenal tumors, and the incidence of suprarenal tumors is higher in patients with these diseases than in normal people; 4. Because the specific cause of suprarenal tumor is not clear yet, the above reasons are only based on clinical reports and clinical case observation.