For the condition below, give the diagnosis and the effect of:
a. 1% hydroxyamphetamine
b. 0.1% adrenaline 
on the affected pupil
 

Patient C A patient with  neurofibromatosis  and spastic paresis.

Answer
Extramedullary neurofibroma compressing the cervical cord.
This is a central cause of Horner's syndrome.
a. 1% hydroxyamphetamine will dilate the miosed pupil
b. 0.1% adrenaline will not dilate the miosed pupil poorly

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