According to WebMD, kidney cysts are closed pockets filled with fluid or tissue. They can become infected or start bleeding, in which case they are called hemorrhagic. They can also increase in size and become painful when pressing on the walls of other organs.
Medscape mentions that the risk of renal cysts becomes greater with age, especially in people over 40 years old. Acquired cystic renal disease is common in this age group, and 50 percent of patients with this medical issue develop hemorrhagic cysts. Wikipedia adds that patients with compromised immune systems are at a greater risk and that hemorrhagic cysts may also develop in women's ovaries.Learn More
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 usually irregular, contains calcified material and has a thick outer membrane.Full Answer >
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.Full Answer >
A Baker's cyst is a lump or bulge that is caused by a build-up of fluid that collects behind the knee joint. Also called a popliteal cyst, it normally results from arthritis in the knee or torn cartilage, according to Mayo Clinic.Full Answer >
Also known as kidney cysts, renal cysts are round, closed pouches that are filled with fluid found in the kidney. Cysts in the kidneys are commonly referred to as simple kidney cysts because they may not cause any harm or complications. Renal cysts are not same as the cysts that form due to the polycystic kidney disease.Full Answer >