CSF then flows through the cerebral aqueduct (aqueduct of Sylvius or mesencephalic aqueduct) into the 4th ventricle. The 4th ventricle is located in the hindbrain. From the 4th ventricle the CSF may flow down the central canal of the spinal cord, or circulate in the subarachnoid space. The central canal of the spinal cord is in direct communication with the 4th ventricle.
A kidney cyst is a fluid-filled sac that grows in your kidneys, which are the bean-shaped organs that filter wastes out of your bloodstream to produce urine. You might have a single cyst on one kidney or many cysts on both kidneys. There are two types of cysts: simple cysts and polycystic kidney disease. Simple cysts are individual cysts that form on the kidneys. They have thin walls and contain a water-like fluid. Simple cysts donât damage the kidneys or affect their function. Polycystic kidney disease (PKD) is an inherited condition that causes many cysts to form on the kidneys. These cysts can damage the kidneys as they grow. Cysts are usually harmless.
If your kidney cyst changes and causes signs and symptoms, you may choose to have treatment at that time. Sometimes a simple kidney cyst goes away on its own. Treatments for cysts that cause signs and symptoms. If your simple kidney cyst is causing signs and symptoms, your doctor may recommend treatment. Options include: Puncturing and draining the cyst, then filling it with alcohol. Rarely, to shrink the cyst, your doctor inserts a long, thin needle through your skin and through the wall of the kidney cyst. Then the fluid is drained from the cyst. Your doctor may fill the cyst with an alcohol solution to prevent it from reforming; Surgery to remove the cyst. A large or symptomatic cyst may require surgery to drain and remove it. To access the cyst, the surgeon makes several small incisions in your skin and inserts special tools and a small video camera.