Kidney tumor 3.2*3.2 cm refers to a kidney tumor with both long and transverse diameter of 3.2 cm, which may be of the following nature: renal cell carcinoma, nephroblastoma, renal staggered tumor and so on. 1. Renal cell carcinoma: Renal cell carcinoma originates from renal tubular epithelial cells, which is the most common renal malignant tumor in clinic, mostly seen in the elderly. Patients mainly present with hematuria, lumbar pain and lumps. 2. Nephroblastoma: Nephroblastoma is a malignant tumor of renal embryonic tissue origin with multiple histological components, also known as renal embryonal tumor, it is the most common malignant renal tumor in children, 90% of children with asymptomatic abdominal mass as the first manifestation. 3. Renal malignant tumor: renal malignant tumor, also known as renal angiomyolipoma, is a benign tumor composed of three components: blood vessels, smooth muscle and fat, and is mostly seen in middle-aged and old-aged women. As the tumor usually has no obvious specific manifestation, most patients are found during physical examination. In addition to the above types, the nature of renal tumors may also be sarcoma, lymphoma, metastatic tumor, etc. Patients are advised to go to the hospital as early as possible for consultation and treatment after the nature of the tumor is clarified in time.