There are five common types of benign, or non-canerous, kidney tumors, all of which are asymptomatic. In many cases, benign renal tumors are not life-threatening; however, they can still cause issues if they become too large.
The most common type of benign kidney tumor is renal adenoma. According to the American Cancer Society, these are small and slow-growing tumors. They are difficult to distinguish between renal cell carcinoma and are typically treated as if they were renal cell cancer.
Oncocytoma tumors grow rather large in size. Oncocytoma kidney tumors can sometimes be mistaken for renal adenomas, and are typically treated as such. Additionally, oncocytoma tumors are typically seen more in men than in women.
Angiomyolipoma is a genetically inherited form of kidney tumors. Most individuals that are diagnosed with angiomyolipoma are also diagnosed with a rare inherited disease called tuberous sclerosis. Tuberous sclerosis can cause tumors throughout the body, not just on the kidney.
Fibroma tumors are tumors of the tissue. They are more common in women than in men.
Lipoma tumors grow within the fat cells and the surrounding tissue. They typically grow large and because of their size they become painful. They are more common in women than in men.
- Photo Credit "urinary system" is Copyrighted by Flickr user: striatic (hobvias sudoneighm) under the Creative Commons Attribution license.
Types of Kidney Tumors
According to statistics released by the American Cancer Association, kidney, or renal, cancer accounts for three percent of all adult cancers in...
What Is a Benign Tumor?
The discovery of a lump or growth in the body that is not supposed to be there can be a frightening and...
Benign Tumor Symptoms
Tumors fall into two categories: benign and malignant. Malignant tumors are tumors that are cancerous and can cause death or other serious...
What Are the Causes of Kidney Oncocytoma Tumors?
A kidney renal oncocytoma is a benign kidney tumor, though it looks like a renal cell carcinoma (RCC). Unlike an RCC, an...
Signs & Symptoms of a Kidney Tumor
The early stages of a kidney tumor may generate no symptoms at all. As the tumor grows and the condition progresses, the...
Bladder Tumor Symptoms
Bladder tumors can cause much discomfort almost immediately after they begin to form. To properly diagnose a bladder tumor a doctor will...
Can a Mass in the Kidney Be Benign?
A mass in the kidney is often caused by a cancerous tumor. Some kidney masses, however, are benign.
What Is a Mass on a Kidney?
There are several types of masses, or growths, that can form on the kidneys. These include various kinds of cysts, as well...