Horner's syndrome causes

Horner's syndrome Microchapters
Home
Patient Information
Overview
Historical Perspective
Pathophysiology
Causes
Differentiating Horner's syndrome from other Diseases
Epidemiology and Demographics
Natural History, Complications and Prognosis
Diagnosis
History and Symptoms
Physical Examination
Laboratory Findings
Chest X Ray
CT
MRI
Ultrasound
Other Imaging Findings
Other Diagnostic Studies
Treatment
Medical Therapy
Surgery
Cost-Effectiveness of Therapy
Future or Investigational Therapies
Case Studies
Case #1
Horner's syndrome causes On the Web
Most recent articles
Most cited articles
Review articles
CME Programs
Powerpoint slides
Images
American Roentgen Ray Society Images of Horner's syndrome causes All Images X-rays Echo & Ultrasound CT Images MRI
Ongoing Trials at Clinical Trials.gov
US National Guidelines Clearinghouse
NICE Guidance
FDA on Horner's syndrome causes
CDC on Horner's syndrome causes
Horner's syndrome causes in the news
Blogs on Horner's syndrome causes
Directions to Hospitals Treating Horner's syndrome
Risk calculators and risk factors for Horner's syndrome causes

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Please help WikiDoc by adding more content here. It's easy! Click here to learn about editing.

Causes

Horner's syndrome is due to a deficiency of sympathetic activity. The site of lesion to the sympathetic outflow is on the ipsilateral side of the symptoms. The following are examples of conditions that cause the clinical appearance of Horner's syndrome:

• First-order neuron disorder: Central lesions that involve the hypothalamospinal pathway (e.g. transection of the cervical spinal cord).
• Second-order neuron disorder: Preganglionic lesions (e.g. compression of the sympathetic chain by a lung tumor).
• Third-order neuron disorder: Postganglionic lesions at the level of the internal carotid artery (e.g. a tumor in the cavernous sinus).