Definition A cyst is a closed pocket or pouch of tissue. It can be filled with air, fluid, pus, or other material. Considerations Cysts may form within any tissue in the body. Cysts within the lung generally are air-filled, while cysts involving the lymph system or kidneys are fluid-filled. Certain parasites, such as trichinosis , dog tapeworm ( Toxocara canis ), and echinococcus , can form cysts within the muscles, liver, brain, lungs, and eyes. Cysts are common on the skin. They develop as a result of infection, clogging of sebaceous glands (acne-related cysts), or around a foreign object stuck in the skin. See also: Pilonidal dimple Common Causes
What are ovarian cysts? Cysts are fluid filled sacs which can develop anywhere on the body. There are several different types of ovarian cysts:
Functional cyst - These form during the normal menstrual cycle. A sac containing eggs forms and usually breaks open to release the egg and the sac dissolves. Sometimes, the sac doesn’t break open and continues to grow, this is called a follicular cyst. It usually disappears in 30 to 90 days. Another type of functional cyst is called corpus luteum and it is when the sac doesn’t dissolve right away. This usually disappears on its own in a few weeks.
Endometriomas - This type of cyst can develop in women who have endometriosis . Tissue from the lining of the uterus grows outside the uterus and if it attaches to the ovary it can cause an cyst.
Cystadenomas - This type of cyst forms from the outer cells of the ovary.
Dermoid cysts - Cells in the ovary which develop hair, teeth or other tissue during pregnancy can become part of an ovari...
New research published online in June in the journal "Nature Medicine" finds that the TNF inhibitor etanercept (Enbrel) may offer treatment and hope to people with autosomal dominant polycystic kidney disease (ADPKD). ADPKD is a genetically inherited renal disease that affects about 1 in 800 people. The disease causes the kidneys to develop cysts and since there are no treatments currently available to prevent the cysts, ADPKD can eventually lead to end stage renal failure and requiring kidney transplants.
The researchers at the Institute for medical Research in Kansas City, Missouri first analyzed several patients with the kidney disease and found that the fluid in the kidney cysts had high levels of tumor becrosis factor-alpha (TNF-alpha). They then genetically engineered mice to develop polycystic kidney dis...
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