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Living with Embryonal tumor with multilayered rosettes

A rare brain and nervous system tumor that mostly affects children in the first two years of life.

Understanding Embryonal tumor with multilayered rosettes

Embryonal tumor with multilayered rosettes (ETMR) is a rare tumor of the central nervous system made of embryonal cells arranged in layered rosettes.

It shows one of three patterns under the microscope. The tumors usually have a change in the C19MC region or, rarely, a DICER1 change, and are WHO grade IV. They are mostly inside the skull, rarely in the spinal cord. They often cause signs of raised pressure inside the head, and sometimes seizures or other nerve signs. Most cases happen in children during the first two years of life.

Signs & symptoms

GARD doesn't list a separate symptom list for this condition, but the summary describes these features:

  • Signs of raised pressure inside the head
  • Seizures in some people
  • Focal neurological signs in some people

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists and cancer specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Cancer specialists (oncologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What tests and imaging confirm the tumor type?
What treatment options do you recommend?
Which specialists, such as pediatric neuro-oncology, should be involved?

Quick facts

GARD says the tumors typically have a C19MC alteration or, rarely, a DICER1 mutation.

Neurological

Also known as: embryonal neoplasm with multilayered rosettes; etmr - embryonal tumor with multilayered rosettes

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Embryonal tumor with multilayered rosettesGARD ID 6352 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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