neurologic disorders
Horner Syndrome
Etiology of Horner Syndrome
Horner syndrome results when the cervical sympathetic pathway running from the hypothalamus to the eye is disrupted. The causative lesion may be primary (including congenital) or secondary to another disorder. Lesions are usually divided into the following: Central (eg, brain stem ischemia, Syrinx of the Spinal Cord or Brain Stem , Peripheral (eg, Regional spread , cervical adenopathy, neck and skull injuries, Peripheral lesions may be preganglionic or postganglionic in origin. 