* Not a rare disease
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Although the exact cause of pineal cysts is unknown, several theories have been proposed based on autopsy findings. One theory is that pineal cysts arise from the pineal recess of part of the brain called the third ventricle. Others have proposed that pineal cysts form as a result of restriction of blood flow and degeneration of glial plaques (deposits that buildup). According to another theory, pineal cysts form in place of a cluster of degenerated group of cells called pinealocytes.
Last updated: 4/8/2010