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A kidney mass is a growth that arises from inside the kidney, according to Washington University School of Medicine in St. Louis. Most kidney masses are found when a patient is undergoing evaluation for something else and receives an ultrasound or CT scan.


It is not clear what causes some types of kidney masses as of July 2015, according to Mayo Clinic. Kidney cysts are fluid-filled masses that form on or in the kidneys. Simple kidney cysts rarely cause complications, but more complex cysts can impair kidney function.


Most cases of renal masses do not show any symptoms, states the Washington University School of Medicine in St. Louis. Doctors usually find the masses accidentally during a diagnosis for another condition. For example, a patient experiencing abdominal pain may undergo a CT scan that happens to ident


A normal kidney is between 4 and 5 inches in length. The kidneys are located in the posterior lower abdominal cavity. Kidneys clean the blood of waste and regulate electrolytes within the body.


A renal mass on the kidneys is a growth that arises from the kidney, according to the Division of Urology at Washington University School of Medicine. The most common renal mass is a cyst, which is a sac filled with fluid arising from the kidney. Cysts rarely cause problems.


Having a mass or tumor on a kidney is often accompanied with other symptoms such as bloody urine, appetite loss, flank pain, weight loss and fatigue, states WebMD.com. It can also cause anemia and swelling in the limbs.


For many physicians, surgery is an option for a kidney mass at clinical stage 1, according to the American Urological Association. At this point, the mass is less than 7 centimeters. About 20 percent of stage 1 masses are benign.


The mean weight of the right lung of an adult male is about 16 ounces, and the left lung weighs 14 ounces, reports the U.S. National Library of Medicine. The mean weight of the right lung of an adult female is 12 ounces, with the left lung at 10.5 ounces.


A mass of 2.2 centimeters is just under one inch in length as 2.54 centimeters is equivalent to 1 inch, according to Metric Conversions. In comparative terms, the liver itself is approximately 7 centimeters in women and 10.5 centimeters in men, explains the National Institutes of Health.


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