A brain cyst is a miniature sac filled with liquid, air or a different form of material. A cyst might not cause any signs or can trigger various symptoms depending on where in the brain it is located.
What are causes of a brain cyst?
Abnormal membrane formation
In various forms of brain cysts, they develop during fetal development in the womb due to a growing irregularity. An arachnoid cyst that forms in the subarachnoid space is called as a leptomeningeal cyst.
The arachnoid cysts are brought about by an anomalous separation that develops as the membranes are developing in the fetal brain. The irregular split causes a small-sized sac in the membrane that is filled with cerebrospinal fluid.
Abnormal development of the brain
In other types of brain cysts including epidermoid and dermoid cysts, they are due to an irregularity in the brain formation. These cysts form once cells that are programmed to turn into skin tissue are accidentally trapped on the interior of the developing fetal brain.
Pineal cysts are a different form of brain cyst which might develop in a fetus or young adult after adolescence. It is believed that they are linked to the shriveling of the pineal gland that generally arises after adolescence.
Brain cyst due to a tumor
Even though tumors and cysts are entirely different formations, some types of brain cysts might be brought about by the swift development of cells that are responsible for the tumors. Once the cancerous cells develop uncontrollably and form tumors, spaces might be produced amidst the brain tissues that are filled with cerebrospinal fluid or other material.