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Brain germ cell tumor (germinoma)

Also called: Cns germ cell tumor, Pineal tumor, Intracranial germ cell tumor

Rare brain tumors of teens and young adults near the pineal or pituitary gland. Most respond very well to treatment.

Typical age10 to 20
OutlookGerminomas are cured in over 9 in 10

Overview

Germ cell tumors come from cells that normally become eggs or sperm. In the brain they include germinomas and nongerminomatous germ cell tumors.

Blood and spinal fluid tumor markers (AFP and beta-hCG) help with diagnosis. Germinomas are very sensitive to radiation and chemotherapy.

Symptoms

Common signs:

  • Headaches with vomiting
  • Trouble looking up or double vision
  • Very thirsty and peeing a lot

Less common

  • Early or delayed puberty
  • Slowed growth
  • Tiredness

Look up a symptom: Double vision or droopy eyelids that get worse when tired · Headaches that keep getting worse over weeks, or with a new seizure or personality change · Puberty starting very early or late · Very thirsty all the time · Vomiting

When to get medical care

Call 911Trouble breathing, heavy bleeding, a seizure, sudden confusion, or fainting: call 911.
Get care todayFever during cancer treatment, or new or quickly worsening symptoms.
See a doctor soonSymptoms lasting more than 2 to 3 weeks.

Causes

Changes in a cell's genes that make it grow out of control. Most happen by chance; some are linked to the risk factors below or to inherited genes.

Does it spread or run in families?

  • Cancer isn't contagious. You can't catch it from someone.

Who is more likely to get it

  • More common in boys
  • More common in people of East Asian ancestry

Diagnosis

Tests look for the cause. Many people checked for these symptoms turn out not to have cancer.

Questions you may be asked

  • When symptoms started and whether they're getting worse
  • Family history of cancer
  • Past illnesses, treatments, and exposures

The exam

A physical exam, focused on where the symptoms are.

Tests

Tests, if needed:

  • MRI of the brain and spine:
  • AFP and beta-hCG blood and spinal fluid tests:
  • Biopsy: Sometimes.

Treatment

Treatment depends on the type, stage, and your child's overall health. A cancer care team makes a plan with you.

Self-care

  • Write down symptoms and when they started
  • Bring someone with you to appointments
  • Ask for copies of test results
  • Ask about clinical trials: they can offer new treatments

Radiation and chemotherapy; surgery for some types.

Prevention

To lower risk or find it early:

  • No known way to prevent it

Which doctor treats this

  • Start with your child's pediatrician.
  • They'll send you to a pediatric oncologist (children's cancer doctor) at a children's cancer center.

Living with it

  • Keep a simple notebook of symptoms, medicines, and questions for visits.
  • Ask for a survivorship care plan when treatment ends.
  • Gentle activity, like walking, can ease tiredness.
  • A cancer diagnosis can affect mood. Tell the care team if you or your family feel down or anxious.

Support groups and helplines

Back to school, work, or sports

  • Most children can return to school during or after treatment.
  • Ask the care team about a school liaison and a 504 plan or IEP for extra help.

Children, pregnancy, and older adults

  • Children: Children with cancer do best at a children's cancer center, where care teams also help with school, growth, and long-term health.

For caregivers

  • Go to visits when you can and take notes.
  • Keep a list of medicines, allergies, and doctors in one place.
  • Learn the warning signs that need fast care, like fever during treatment.
  • Take breaks and ask for help. Caregivers need care too.

Outlook

Outlook depends on the type and stage. Cancers found early are usually easier to treat, and treatments keep improving.

Support is available: ask about social workers, nutrition help, and support groups.

Getting ready for your visit

Bring a list of symptoms and medicines.

What to bring

  • A list of medicines and supplements
  • Notes on when symptoms started
  • Past test results and scans

Questions to ask

  • Is it a germinoma or another type?
  • Will hormones need to be replaced?
  • What stage is it, and what are the treatment options?
  • Are there clinical trials for my child?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Brain germ cell tumor (germinoma)

Sources

Last updated 2026-11-13.