Patient :Hi Doctor. Thank you for helping. At first I should apologize for my poor English.My 14 year old brother have a round bony outgrowth on back of his head. I guess it's bottom of cerebellum. I'm not sure if it's bony or not but it's hard. He say it has been two years since he knew about it. I searched about what it would be but I'm confused. Can you help me to know what's happening? Is it dangerous? I'm so afraid.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.