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The Pineal Gland

The Pineal Gland

The pineal gland, a diminutive endocrine structure named for its pinecone-shaped appearance, is situated atop the third ventricle within the diencephalon region of the forebrain. This gland, composed of secretory cells known as pinealocytes arranged in compact cords and clusters around dense particles of calcium salts, plays a pivotal role in hormonal regulation.
The primary secretion of the pineal gland is the hormone melatonin, derived from serotonin. The concentration of melatonin in the...

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Related Experiment Video

Updated: Jan 30, 2026

Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst

Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst

Published on: March 31, 2023

Unedited pineal cyst microneurosurgery.

Joham Choque-Velasquez¹, Juha Hernesniemi²

¹Department of Neurosurgery, Helsinki University Hospital, Helsinki, Finland.

Surgical Neurology International

|January 29, 2019

Summary

This video demonstrates a safe and effective microsurgical technique for removing large pineal cysts, preserving normal anatomy. The procedure resulted in significant symptom improvement for the patient.

Keywords:

Pineal cyst sitting position supracerebellar infratentorial approach unedited microsurgical video

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Area of Science:

Neurosurgery
Surgical Oncology

Background:

Pineal cysts are benign tumors of the pineal gland with unknown causes.
Microsurgical resection remains a gold standard for pineal region lesions, despite increasing endoscopic use.
This study focuses on a specific microsurgical technique for large pineal cysts.

Purpose of the Study:

To demonstrate the efficiency and safety of a microsurgical technique for pineal cyst removal.
To highlight the principle of "simple, clean, and preserving normal anatomy" in deep brain surgery.
To present an unedited microneurosurgery of a large benign pineal cyst.

Main Methods:

A supracerebellar infratentorial paramedian approach was used in the sitting position.
The procedure involved accessing the pineal region, aspirating cyst contents, and carefully dissecting surrounding vessels.
The cyst was removed using gentle traction and suction, with meticulous hemostasis.

Main Results:

The microsurgical resection of the large pineal cyst was successfully completed.
The patient experienced an uneventful postoperative course.
Significant improvement in headache and psychiatric symptoms was observed, with reduced medication needs.

Conclusions:

The presented microsurgical technique is efficient and safe for pineal cyst removal.
Preservation of normal anatomy is crucial in deep brain neurosurgery.
This unedited video provides essential details for neurosurgeons performing pineal cyst surgery.