Kidney

What the Kidney Is and Does

The kidneys are two reddish-brown, bean-shaped organs located in your abdomen, one on each side of your spine just below the rib cage. Each kidney is about the size of a fist. Their main job is to filter your blood by removing waste products and extra water, which become urine. This helps keep your body’s chemical balance steady, including important minerals like sodium, potassium, and calcium. The kidneys also make hormones that help control your blood pressure and tell your bone marrow to produce red blood cells.

Why Kidneys Matter in Cancer Care

Kidneys can be affected by cancer, which may start in the kidney tissue itself or nearby structures. The most common type of kidney cancer in adults is renal cell carcinoma. Children can develop a rare kidney cancer called Wilms tumor. Kidney cancer may not cause symptoms early on, but as it grows, it can cause signs like blood in the urine, a lump in the abdomen, or pain in the side. Because the kidneys play a vital role in filtering blood and balancing chemicals, cancer or other kidney problems can affect overall health and treatment options.

What Patients Might Notice or Hear

If kidney cancer or other kidney problems are suspected, your doctor may order blood and urine tests to check how well your kidneys are working and look for signs of disease. Imaging tests like ultrasounds, CT scans, or MRIs can help find tumors or other abnormalities. Sometimes a biopsy, where a small tissue sample is taken, is needed. Symptoms that should prompt a visit to your healthcare provider include blood in your urine, unexplained weight loss, persistent pain in your side, a lump in your abdomen, or loss of appetite.

Common Kidney Conditions and Related Terms

Besides cancer, kidneys can be affected by cysts, stones, infections, and chronic diseases that slowly damage their filtering units called nephrons. Kidney failure may require treatments like dialysis or a transplant. The ureters are tubes that carry urine from the kidneys to the bladder, and problems there can also affect kidney health. Understanding terms like renal (meaning related to the kidney) and knowing about nearby organs like the bladder can help you follow your care plan better.

Questions to Ask Your Care Team

If you hear the word “kidney” in your medical reports or discussions, it’s helpful to ask what it means for your specific situation. You might ask: What is the health of my kidneys? Are there signs of cancer or other problems? What tests will be done to check my kidneys? How might kidney function affect my treatment options? What symptoms should I watch for that might mean kidney issues? Your care team can explain how kidney health fits into your overall care.

Understanding the Term in Context

“Kidney” can appear in many places, such as test results, treatment plans, or clinical trial descriptions. It does not always mean cancer or serious disease. Sometimes it simply refers to normal kidney function or routine checks. Avoid assuming the worst if you see the term; instead, ask for clear explanations about what it means for you personally.

Important Safety Note

This information is meant to help you understand what kidneys are and why they matter in cancer care. It does not replace advice from your healthcare provider. Always talk with your care team about your specific health, test results, and treatment options to get information tailored to you.

Next Steps for Patients and Caregivers

If you have concerns about your kidneys or notice symptoms like blood in your urine or unexplained pain, contact your healthcare provider. Regular checkups and open communication with your care team can help catch problems early and guide the best care for your kidney health and overall well-being.