Are all kidney cysts the same?


By AGENCY

Back pain is one of the symptoms of cysts in your kidneys, whether they be simple cysts or from polycystic kidney disease. — Filepic

World Kidney Day was commemorated on Thursday (March 14, 2024), making this a good time to learn more about the difference between two kidney disorders: kidney cysts and polycystic kidney disease.

Your kidneys are situated at the back of your abdomen under your lower ribs, one on each side of your spine.

One of the important jobs of the kidneys is to clean the blood.

As blood moves through the body, it picks up extra fluid, chemicals and waste.

The kidneys separate this material from the blood and it’s carried out of the body in urine.

If the kidneys are unable to do this and the condition is untreated, serious health problems result, with eventual loss of life.

Two kidney disorders with similar names, but different circumstances, are kidney cysts and polycystic kidney disease.

> Kidney cysts

Kidney cysts are round pouches of fluid that form on or in the kidneys.

Kidney cysts can occur with disorders that impair kidney function.

But more often, kidney cysts are a type called simple kidney cysts.

Simple kidney cysts aren’t cancerous and rarely cause problems.

Complex cysts, however, need to be watched for changes that could be cancerous.

In one large study, about one in 10 people had simple kidney cysts, with this statistic increasing to nearly one in five for people 50 years and older, according to the US National Institute of Diabetes and Digestive and Kidney Disorders (NIDDK).

It’s not clear what causes simple kidney cysts.

One theory suggests that they develop when the surface layer of the kidney weakens and forms a pouch.

The pouch then fills with fluid, detaches and develops into a cyst.

Simple kidney cysts typically don’t cause symptoms, but if they grow large enough, symptoms may include:

  • Dull pain in the back or side
  • Fever
  • Upper stomach pain.

If a simple kidney cyst causes no symptoms and doesn’t affect kidney function, you may not need treatment.

Instead, your healthcare professional may recommend that you have imaging tests, such as ultrasounds, over time to see whether your kidney cyst changes.

If a simple kidney cyst is causing symptoms, treatment may include piercing and draining the cyst, then filling it with a solution to prevent recurrence; or surgery to remove the cyst.

> Polycystic kidney disease

Polycystic kidney disease is an inherited disorder in which clusters of non-cancerous cysts develop primarily within your kidneys, causing them to enlarge and lose function over time.

The cysts vary in size and can grow very large.

Having many cysts or large cysts can damage your kidneys.

Polycystic kidney disease is one of the most common genetic disorders, affecting about 500,000 people in the United States, according to the US NIDDK.

Symptoms of polycystic kidney disease can include:

  • High blood pressure
  • Back or side pain
  • Blood in your urine
  • A feeling of fullness in your abdomen
  • Increased size of your abdomen due to enlarged kidneys
  • Headaches
  • Kidney stones
  • Urinary tract or kidney infections
  • Kidney failure.

Treating polycystic kidney disease involves dealing with the symptoms and complications in their early stages, including:

  • Managing cyst growth with medication.
  • Delaying progression of the disease by controlling high blood pressure.
  • Lifestyle strategies to help your kidneys stay as healthy as possible for as long as possible, including maintaining a healthy weight, drinking fluids throughout the day, following a low-salt diet and eating less protein.
  • Controlling pain.
  • Prompt treatment of bladder or kidney infections with antibiotics to prevent kidney damage.
  • Preventing obstructive blood clots in the urinary tract by drinking extra fluids at the first sign of blood in the urine.
  • Dialysis or a kidney transplant if kidney failure occurs. – By Joel Streed/Mayo Clinic News Network/Tribune News Service
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