A 4 year old previously healthy boy is brought to the physicion because of chronic, severe headaches, nausea nad vomitig. Visual field testing shows poor peripheral vision. MRI scan ofthe head demonstrates a solid and cystic 4 cm mass with focal calcificaitons. Resection shows dark oily fluid containing granular debris. 1. What is likely diagnosis of this kid? 2. What is it derived form? 3. Common age of presentation?

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Neurology is the branch of medicine that focuses on the study, diagnosis, and management of conditions affecting the nervous system.


1. A 4 year old previously healthy boy is brought to the physicion because of chronic, severe headaches, nausea nad vomitig. Visual field testing shows poor peripheral vision. MRI scan ofthe head demonstrates a solid and cystic 4 cm mass with focal calcificaitons. Resection shows dark oily fluid containing granular debris. 1. What is likely diagnosis of this kid? 2. What is it derived form? 3. Common age of presentation?