Horner syndrome

Clinical Manifestations

• Unilateral ptosis, miosis, and anhidrosis

Differential Diagnosis

• First-order neuron
  • Stroke, e.g. lateral medullary syndrome
  • CNS tumour
• Second-order neuron
  • Pancoast tumour
  • Spinal anaesthesia
• Third-order neuron
  • Internal carotid dissection
  • Internal carotid thrombosis
  • Cavernous sinus syndrome