Can Ultrasound Detect Kidney Cancer?

Yes, ultrasound can detect kidney cancer, particularly when there is a noticeable mass or abnormality in the kidney. It is often one of the first imaging tests used when a person has symptoms like blood in the urine or unexplained side pain. Ultrasound is non-invasive, widely available, and does not involve radiation, making it a useful initial tool for evaluating kidney health.

During the procedure, sound waves are used to create images of the kidney. These images can help identify:

  • Solid masses, which may suggest cancer
  • Fluid-filled cysts, which are usually non-cancerous
  • Swelling or structural abnormalities

If the ultrasound shows a solid mass, this raises suspicion for kidney cancer, but the test cannot confirm whether the mass is definitely cancerous. Additional imaging—usually a CT scan or MRI—is needed for more detailed evaluation. These tests provide clearer information about the tumor’s size, location, and whether it may have spread to nearby structures.

In some cases, especially for small or unclear findings, the doctor may recommend further tests or repeat imaging over time. If a biopsy is needed, ultrasound may also be used to guide the needle into the tumor safely.

While ultrasound is an important diagnostic tool, its accuracy is limited by factors like the patient's body size or the depth and location of the tumor. That’s why it is most often used in combination with other imaging tests to make a complete and accurate diagnosis.

If any abnormality is found on ultrasound, follow-up testing should not be delayed. Early detection improves the chances of effective treatment and better outcomes.

Looking for more questions?

Visit our Kidney Cancer Questions page for all other topics explained in plain language.

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