A member asked:

What does the pineal gland do and how big can a cyst on it get before surgury is needed?

A doctor has provided 1 answer

Pineal cyst: The pineal gland produces melatonin (which helps regulate sleep/wake cycles). Many pineal cysts are found incidentally. The ones that need treatment are usually the ones that cause symptoms (hydrocephalus). Some doctors would elect to follow asymptomatic cysts >10mm w/ serial imaging while others would just follow clinically. It really depends on the surgeon.

Answered 4/19/2021

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