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Kidney Cancer Institute explains simple kidney cysts do not pose a cancer risk to patients, whereas complex kidney cysts have different characteristics that may make them cancerous. A simple kidney cyst is spherical, is filled with liquid and contains a thin outer membrane. A complex kidney cyst is


As of 2014, the causes of kidney cysts are unclear, according to WebMD. These cysts do not appear to have a genetic component. Males are more prone to kidney cysts than females, and these cysts are extremely common in people over 50.


The cause of kidney cysts is not clear, but medical professionals theorize that the cysts develop when the kidney's surface layer forms a pouch and weakens, according to Mayo Clinic. Cysts develop when the pouch fills with fluid and detaches from the surface layer of the kidneys.


Simple kidney cysts that do not cause any symptoms and that do not interfere with kidney function typically require no treatment, according to Mayo Clinic. If a kidney cyst causes signs or symptoms, a doctor may drain it or surgically remove it.


Simple kidney cysts develop for unknown reasons, Mayo Clinic says. According to one theory, a cyst begins to form when the kidney surface loses firmness and eventually becomes a pouch. This pouch fills with fluid, separates from the kidney and grows into a cyst.


Treatment options for kidney cysts usually include puncturing and draining the cyst, at which point it may be filled with alcohol, states Mayo Clinic. Surgery may also be used to remove the cyst. However, if the cyst is diagnosed as a simple kidney cyst, no treatment may be necessary.


Simple kidney cysts are generally harmless, while cysts associated with polycystic kidney disease can be dangerous and have the potential to lead to kidney failure, according to the National Kidney Foundation. Irregular cysts can be a sign of kidney cancer, states Cleveland Clinic.


Simple kidney cysts may develop due to the obstruction of tubules, diverticula sac detachment, or insufficient blood supply to the kidneys, notes the National Institute of Diabetes and Digestive and Kidney Diseases. Kidney cysts occur when nephron tubules enlarge and fill with fluid, according to Cl


Doctors are not sure what causes simple kidney cysts, according to Mayo Clinic. One theory holds that a weakened area of the kidney forms a pouch that fills with fluid, detaches and becomes a cyst. Heredity is the cause of cysts that develop due to polycystic kidney disease, states MedlinePlus.


Simple kidney cysts may cause pain if they grow too large, in which case the individual feels a dull pain in the back, side or upper abdomen, according to the National Kidney Foundation. A simple kidney cyst that becomes infected can cause pain and fever, and if the kidney cyst bursts, it causes sev