Disease analysis: pineal cyst is a non-neoplastic benign lesion, which is usually found by accident during MRI. In imaging diagnosis, it is significant when the diameter of adult pineal cyst is greater than 65438±0cm. I suggest you upload a picture or provide measurement data. Because the pineal cyst is a benign tumor, the clinical symptoms are the oppression of surrounding tissues: mainly increased intracranial pressure, headache, vomiting, blurred vision, gait and motor instability. Suggestion: If the cyst is large in diameter or has clinical symptoms, there are many surgical treatments, such as transcallosal approach, lateral ventricle approach, suboccipital supratentorial approach and infratentorial approach. Are carried out under a microscope. Please choose the best surgical treatment according to the specific situation.