PKD Clinic

Polycystic Kidney Disease& Kidney Cysts

Kidney Cyst (Renal Cyst)

Renal failure refers to temporary or permanent damage to the kidneys that results in loss of normal kidney function. > Kidney Cyst

Kindey Cyst Overview

Kidney Cyst Overview

Definition of kidney cysts

Kidney cysts describe an illness condition that small sac of fluids developing in the kidneys. There are two types of this disease, one is called simple kidney cyst, and the other is complex kidney cyst. Usually, kidney cysts we mentioned refer to simple ones and are often benign. Well, the latter one could possibly be cancerous.

Kidney cysts can be a natural by-product of aging. People with old age are often living with simple kidney cysts and don't need any kind of treatments. It is estimated that 50% of the adults may suffer from this benign kidney cysts by the time of their 50 years old. Usually, the disease has no symptom but also can be serious in certain cases.

Things become different when it comes to complex kidney cysts. Complex ones pose irregularities whether in shape or inside the cysts. This type of kidney cyst should be closely monitored since they can be indicative of kidney cancer. Symptoms of simple kidney cyst may be rare to perceive or very generalized making them hard to be detected. Common signs include dull pain in back or side, fever and some others.

Treatment is not necessarily needed for simple cysts. If the cyst is large, surgery may be needed. Most of the procedures can be performed using a laparoscope, and percutaneous sclerotherapy is delivered so as to allow the fluid to be drained from the sac. Alcohol solution is injected too. This therapy ensures the cysts from growing but usually fails to take effect.

Certain dietary therapy is needed when one's medical condition becomes serious because dietary therapy is an important part of treatments. Ask your dietitian for individualized diet suggestions due to your personalized condition.

Kidney Cyst Diagnosis

Kidney Cyst Diagnosis

Simple kidney cysts are often found while the patient is seeing the doctor about another condition. The most common tests used to diagnose simple kidney cysts include:

● Imaging tests. Imaging tests, such as an ultrasound, computerized tomography (CT) scan and magnetic resonance imaging (MRI), are often used to investigate simple kidney cysts. Imaging tests can help your doctor determine whether a kidney mass is a cyst or a tumor.

● Kidney function tests. Testing a sample of your blood may reveal whether a kidney cyst is impairing your kidney function.

Once kidney cyst is detected, we recommend people to keep a healthy living habit and a reasonable diet, that is because the growth speed of cyst can be affected by these factors. Generally speaking, the simple kidney cyst will not cause any obvious symptoms, so a particular treatment is not needed. If the kidney cysts cause some obvious symptoms, then shrinking the cyst becomes the most important thing, compared to a surgery, Chinese herbal medicines seems to be safer and more efficient. The cyst fluid can be reabsorbed through increasing the permeability of cyst wall and changing inner and outer pressure difference of cyst wall.

If you are diagnosed that there has the impaired kidney function, then enhancing kidney function should be also done. Through providing nutrition for damaged kidneys, promoting blood circulation and removing blood stasis, Chinese herbal medicines can play a part in enhancing kidney function.

Kidney Cyst Symptoms

Kidney Cyst Symptoms

Kidney Cysts form within the kidneys and are full of fluids. It usually causes no harm and is accompanied with no symptom. In most cases, they can be detected by ultrasound or computerized tomography scan unintentionally. Sometimes, the disease causes signs, including:

Abdominal mass

Abdominal mass appears in one's abdomen and makes it the major cause of visiting doctors.

Pain in your side, back, or upper abdomen

Backache or waist ache might appear in Kidney Cysts patients if the cysts become enlarged or pressed on other surrounding organs.


Fever, chills and other symptoms caused by infections

High blood pressure

It is unclear what the relationship between kidney cysts and hypertension, but still, high blood pressure should be closely monitored and prevented by certain hypotensor.

It is said that before serum creatinine evaluates, half of the Kidney Cysts patients would suffer from high blood pressure. In other words, hypertension directly affects one's prognosis.


Small amount of protein would present in patients' urine but usually won't exceed 2g per day.


Microscopic or gross hematuria might develop, which is the most typical symptom that accounts for the deterioration of kidney cysts. Patients with Kidney Cysts often result in serious backache when hematuria attacks.

Declined kidney function

Decreased kidney function only develops when one's kidney cysts become serious enough and thus affects one's kidney function accordingly. Sometimes, the cysts become large enough and make treatment or surgery inevitable.

Kidney Cyst Treatment

Kidney Cyst Treatment

Simple cysts are the most common type of kidney cyst. They are not the same thing as PKD, which is a progressive disease that can lead to Kidney Failure. Simple kidney cysts most often do not cause harm. The following information is about the treatments for simple kidney cyst.

If the simple kidney cyst does not cause symptoms or complications, patients do not need treatment. The doctors may simply watch the cysts to make sure they don't cause any problems. However, the treatment is needed when there are some symptoms.

● With the help of ultrasound, the doctor punctures the cyst with a long needle inserted through the skin.
● The doctor drains the cyst.
● Then the cyst may be filled by a solution that contains alcohol. This causes the tissue to harden and reduces the chances of recurrence.

Generally speaking, this is all that is needed to treat a simple kidney cyst. However, in some cases, a cyst will return and refill with fluid.

For a large cyst or one that returns after aspiration, the surgery may be needed under general anesthesia. It usually involves the following steps:

● Small incisions will be made.
● The doctor inserts laparoscope and other instruments.
● Then, the doctor may drain the fluid, and remove or burn the cyst's outer wall to keep it from reforming.
● Patients may stay in the hospital for one or two days after surgery.

Renal Cysts

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