Renal tumours

What Is It ?

There are a number of types of renal tumors, which may be benign or malignant. If the tumor is benign, it is not cancerous and does not metastasize, or spread, into other tissues and does not grow in an uncontrolled manner. If the tumor is malignant, it can spread to other tissues via blood, lymph, or direct invasion.

Benign renal tumors include renal oncocytoma, angiomyolipoma, fibroma, and lipoma. An angiomyolipoma is a benign tumor that usually occurs in middle-aged women. Though it is not precancerous, a large angiomyolipoma is potentially fatal if it ruptures. If this renal tumor is large, begins growing, or presents symptoms, doctors will likely recommend surgical removal or an arterial embolization procedure.

A fibroma is another rare benign renal tumor, more common in women. This tumor is often asymptomatic, occurs on the rim of the kidney, and resembles malignant tumors. Because it is difficult to diagnose whether the tumor is malignant or benign, doctors often recommend surgical removal. Lipomas are also rare and more common in middle-aged women. This renal tumor affects fat cells in the kidney, may present symptoms of regional pain and blood in the urine, and may be precancerous.

Renal cell carcinoma (RCC), which originates in the proximal tubular epithelail cells in the renal nephron is the most common malignant tumour of the kidney. They are classified based on their microscopic appearance. The common types include clear cell renal cell carcinoma, papillary renal carcinoma, and chromophobe renal cell carcinoma.. Nephrectomy, which is the surgical removal of the kidney, is recommended for all types of RCC.

Other types of malignant tumors include Wilms’ tumor and urothelial carcinoma of the renal pelvis. Wilm’s tumor, also known as nephroblastoma, is a renal tumor that affects young children.