Case 35

Clinical History:
        A twelve-year-old boy had had a headache and had been vomiting for 2 months. Here are his skull film, CT scans and MRI scans of his brain.
.


Figure 1. Lateral film of the sella turcica.



Figure 2. Noncontrast CT scans of his brain.




Figure 3. MRI scans of his brain: sagittal T1WI (upper left), axial T1WI (upper
right and middle left), axial T2WI (middle right), and postcontrast T1WI
(lower).

What is your diagnosis?
 

ANSWER