Kidney Size: Is Your Ultrasound Result Normal?

Ultrasound Kidney Size

Hello, doctor.
I have been monitoring my hematuria under a microscope.
Recently, I underwent a complete abdominal ultrasound, including a bladder scan after drinking water.
The report indicated that the size and echogenicity of both kidneys are normal, with the right kidney measuring 10.8 cm and the left kidney measuring 10.7 cm.
I would like to ask, isn't it typical for the left kidney to be longer in normal individuals? My results show that the right kidney is longer; does this indicate any issues? Additionally, are these kidney sizes considered smaller than average? Is there a concern for atrophy? I am approximately 158 cm tall.
Thank you, doctor!

Shenyou, 30~39 year old female. Ask Date: 2023/05/11

Dr. Lin Wuxuan reply Internal Medicine

Hello, based on your statement that "the examination report indicates that the size of both kidneys and the ultrasound echogenicity are normal," there is no need for excessive concern.
Thank you.

Reply Date: 2023/05/11

More Info

When it comes to kidney size and health, it’s important to understand that there is a range of normal sizes for kidneys, and variations can occur among individuals. In your case, the ultrasound report indicates that your right kidney measures 10.8 cm and your left kidney measures 10.7 cm. While it is often noted that the left kidney is slightly larger than the right, this is not a strict rule. The difference in size you are experiencing is within the normal range and does not necessarily indicate any underlying health issues.

Kidney size can be influenced by various factors, including genetics, body size, and overall health. In adults, the typical kidney length ranges from about 9 to 12 cm, so your measurements fall well within this range. The fact that both kidneys are described as having normal size and echogenicity (the ability to reflect ultrasound waves) suggests that there are no immediate concerns regarding kidney function or structure.

Regarding your concern about kidney atrophy or shrinkage, it is essential to note that kidney size alone is not a definitive indicator of kidney health. Atrophy typically refers to a significant reduction in kidney size due to damage or disease, which would usually be accompanied by other symptoms or abnormal findings in blood tests or imaging studies. Since your ultrasound results indicate normal size and echo patterns, there is no immediate indication of atrophy.

It is also important to consider your ongoing issue with hematuria (blood in urine). This condition can arise from various causes, including urinary tract infections, kidney stones, or other renal pathologies. Continuous monitoring and follow-up with your healthcare provider are crucial to determine the underlying cause of your hematuria. Regular imaging and possibly additional tests, such as urine analysis or cystoscopy, may be warranted based on your physician's recommendations.

In summary, your ultrasound results indicate that both kidneys are of normal size and appearance, and the slight difference in length is not unusual. There is no evidence of atrophy based on the information provided. However, it is essential to continue monitoring your hematuria and maintain open communication with your healthcare provider to address any concerns and ensure your kidneys remain healthy. If you have further questions or experience any new symptoms, do not hesitate to reach out to your doctor for personalized advice and care.

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