Early Symptoms of Kidney Cancer
Kidney cancer, also called renal cell carcinoma (RCC) is one of the 10 most common cancers in both men and women. But symptoms don’t often appear until later stages, or until the tumor is large. Kidney cancer is most commonly diagnosed in people over 60 years old. It’s often found by accident during routine imaging tests.
Blood in the urine
Hematuria, or blood in the urine, is one of the most common symptoms. It appears in 40 to 50 percent of people with kidney cancer, according to the Kidney Cancer Association.
Even a small amount of blood can cause a color change such as pink, brownish, or even red. The presence of blood can be inconsistent, appearing about every other day. Sometimes the amount of blood is so small it can only be detected during a urinalysis.
Other more common causes of blood in the urine include bladder or kidney infection, kidney stones, cysts, or injury to the kidney. Always see a doctor if you detect blood in your urine.
Lower back pain
Back pain is common in people over 40 years old. This is usually due to musculoskeletal injury or disk degeneration. Back pain is also less commonly a symptom of kidney cancer. About 41 percent of people with RCC report back pain. But most people don’t experience back pain until the cancer is in the later stages.
The pain can range from a dull ache to a sharp stab on one side of your flank or below the ribs on your back. Your flank is the area between your lower back and the bottom of the backside of your ribs. It may also feel like side pain to some people.
The type of pain associated with RCC can vary. Some people report pressure instead of an ache or sharp pain. See a doctor if you have any sudden pain that is persistent and lasts more than a few days. Mention any other symptoms during your visit to help your doctor determine the likely cause.
A mass or lump around your abdomen
A mass or lump in the abdomen, side, or back can also be a sign of kidney cancer. It can feel like a hard, thickening, or bulging bump under the skin. About 45 percent of people with RCC have an abdominal mass.
But kidney lumps are hard to feel, especially in the early stages. That’s because the kidneys sit deep in the abdomen. You may not even see or feel the lump as the tumor grows.
If a lump is discovered, your doctor will likely order diagnostic tests. Usually an ultrasound or a CT scan. These tests may help determine the cause of the lump. In most cases a biopsy will be needed to confirm the diagnosis.
Keep in mind that not all lumps are cancer. Talk to your doctor if you’re concerned about a lump around your abdomen.
Anemia and fatigue
Fatigue is one of the most common symptoms of any type of cancer, especially during treatments. About 70 to 100 percent of people who undergo cancer treatments report Trusted Source fatigue. Many people with cancer say fatigue is one of the most difficult symptoms to manage.
Fatigue from cancer is different than just feeling tired from lack of sleep. Cancer-related fatigue is persistent and interferes with daily activities. It can also intensify as time goes on.
About 21 percent of people with kidney cancer have anemia, or low red blood cell count. Normally your kidneys signal your body to make red blood cells. Cancer can interfere with that signaling. Anemia can also cause worsening fatigue, shortness of breath, dizziness, and pale looking skin.
Make an appointment with your doctor if you’re feeling unusually tired. They can run tests to help diagnose the cause and find the right treatment.
Unexpected weight loss
About 28 percent of people with kidney cancer report weight loss. This usually happens quickly, as the tumor spreads to other organs. You may suddenly lose interest in eating, even when you’re not trying to lose weight. This loss of appetite can contribute to weight loss.
A fever on its own isn’t usually a symptom of kidney cancer, but unexplained and recurring fevers may be. These fevers are usually not caused by an infection and commonly will come and go.