The imaging below is the three-dimensional CT scan of a patient's skull. The patient has no previous head injury or operation.

a. What does the scan show ?

b. What physical sign may be present on 
     orbital examination ?

 

Answer
Absence of the greater wing of the sphenoid in the left orbit.
The patient has neurofibromatosis type I

Answer to b
Left pulsatile exophthalmos.
 

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