Pineal Region Tumors (Pediatric)

Pineal tumors form in or near the pineal gland, a small structure deep in the center of the brain that helps regulate sleep by making melatonin. These tumors may be benign or malignant and can block the flow of cerebrospinal fluid, causing hydrocephalus. Pineal region tumors are rare, making up about 1 percent of brain tumors in adults and up to 8 percent in children.

Types & Stages

Common pineal region tumors include:

• Germ cell tumors: The most common type in this region. They can be benign or malignant.
   
• Pineocytomas: Usually slow-growing and less aggressive.
   
• Pineoblastomas: Fast-growing, aggressive tumors seen most often in young children.
   
• Gliomas: Tumors that arise from nearby glial cells and can range from low grade to highly aggressive.

Signs & Symptoms

Symptoms may include: 

• Headaches
• Blurred or double vision
• Trouble moving the eyes up or down
• Hydrocephalus
• Nausea and vomiting
• Memory or thinking changes
• Sleep problems
• Balance or coordination issues
• Hormonal changes

Diagnosis

Diagnosis may involve:

• Physical and neurological exam
• Eye exam
• MRI
• CT scan
• Lumbar puncture
• Blood tests for tumor markers
• Biopsy

Treatment

Treatment depends on the tumor type and may include:

• Surgery to remove all or part of the tumor
• Craniotomy or, in select cases, minimally invasive surgery
• VP shunt or endoscopic third ventriculostomy (ETV) to relieve hydrocephalus
• Radiation therapy, including stereotactic radiosurgery or proton therapy
• Chemotherapy
• Hormone therapy
• Targeted therapy
• Corticosteroids to reduce swelling

Causes & Risk Factors

The exact cause is unknown, but some pineal tumors may be linked to inherited conditions such as retinoblastoma and Li-Fraumeni syndrome.

Screening

There is no routine screening for pineal tumors. Diagnosis depends on recognizing symptoms and seeking prompt medical evaluation.