- Parents Home
- Para Padres
- Allergy Center
- Asthma Center
- Cancer Center
- Diabetes Center
- Diseases & Conditions
- Doctors & Hospitals
- Emotions & Behavior
- First Aid & Safety
- Flu Center
- Food Allergy Center
- General Health
- Growth & Development
- Heart Health
- Homework Help Center
- Infections
- Newborn Center
- Nutrition & Fitness Center
- Play & Learn Center
- Pregnancy Center
- Q&A
- Recipes
- School & Family Life
- Sports Medicine Center
- Videos
- Kids Home
- Para Niños
- Asthma Center
- Cancer Center
- Diabetes Center
- Feelings
- Getting Help
- Health Problems
- Health Problems of Grown-Ups
- Heart Center
- Homework Center
- How the Body Works
- Illnesses & Injuries
- Kids' Medical Dictionary
- Movies & More
- Nutrition & Fitness Center
- Puberty & Growing Up
- Q&A
- Recipes & Cooking
- Relax & Unwind Center
- Stay Safe Center
- Staying Healthy
- Staying Safe
- Videos
- Teens Home
- Para Adolescentes
- Asthma Center
- Be Your Best Self Center
- Cancer Center
- Diabetes Center
- Diseases & Conditions
- Drugs & Alcohol
- Expert Answers (Q&A)
- Flu Center
- Homework Help Center
- Infections
- Managing Your Medical Care
- Managing Your Weight
- Nutrition & Fitness Center
- Recipes
- Safety & First Aid
- School & Work
- Sports Center
- Stress & Coping Center
- Videos
- Your Body
- Your Mind
A to Z: Primitive Neuroectodermal Tumor (PNET)
May also be called: Medulloblastoma; Posterior Fossa PNET; Supratentorial PNET; Pineoblastoma
Primitive neuroectodermal (PRIM-ih-tiv nur-oh-ek-tuh-DERM-ul) tumors, or PNETs, are tumors that can happen anywhere in the brain. These tumors can spread to the fluid that surrounds the brain and spinal cord.
More to Know
Primitive neuroectodermal tumors develop from immature nerve cells in the brain. These primitive cells are often cancerous, and can start to grow out of control.
Types of PNETs include:
- medulloblastoma
- posterior fossa PNET
- supratentorial PNET
- pineoblastoma
Symptoms of a PNET often depend on the size of the tumor and where it is, but common symptoms include:
- headaches, nausea, and vomiting (especially in the morning) caused by increased pressure in the head
- weakness in the arms and legs
- vision problems
- seizures
- trouble with balance and coordination
PNETs require aggressive treatment, including surgery, chemotherapy, and radiation therapy.
Keep in Mind
PNETs are serious tumors that need a lot of treatment. But recent medical advances have made a cure possible for many of the children who have them.
All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.
Note: All information is for educational purposes only. For specific medical advice,
diagnoses, and treatment, consult your doctor.
© 1995- The Nemours Foundation. KidsHealth® is a registered trademark of The Nemours Foundation. All rights reserved.
Images sourced by The Nemours Foundation and Getty Images.