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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.
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Related Experiment Video

Updated: Jul 19, 2026

Endoscopic Third Ventriculostomy and Pineal Biopsy from a Single Entry Point

Endoscopic Third Ventriculostomy and Pineal Biopsy from a Single Entry Point

Published on: June 28, 2024

Metastases to the pineal gland.

Andrew B Lassman¹, Jeffrey N Bruce, Michael R Fetell

¹Department of Neurology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. lassmana@mskcc.org

|October 13, 2006

Summary

Metastases to the pineal gland are rare but serious, often presenting with silent primary cancers. Recognizing these symptoms is crucial for timely diagnosis and treatment of brain tumors.

Area of Science:

Neuro-oncology
Radiology
Oncology

Background:

Pineal gland tumors are rare.
Metastatic disease to the pineal gland is an uncommon but significant finding.
Leptomeningeal metastases are associated with poor prognosis.

Purpose of the Study:

To describe the clinical and radiographic features of symptomatic pineal gland metastases.
To highlight the importance of considering metastatic disease in the differential diagnosis of pineal tumors.

Main Methods:

Retrospective identification of 10 patients with symptomatic pineal gland metastases.
Review of clinical data and radiographic findings.

Main Results:

Ten patients with symptomatic pineal gland metastases were identified.

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Leptomeningeal metastases were frequent and indicated a poor prognosis.

Primary cancers were often clinically silent, either in remission or previously undiagnosed.

Conclusions:

Symptomatic pineal gland metastases, though uncommon, warrant consideration in the differential diagnosis of pineal masses.
The presence of leptomeningeal metastases is a critical prognostic indicator.
Early recognition of silent primary cancers presenting as pineal metastases is essential.