Larynx and Pharynx - LO6

6. What is Horner’s syndrome, and what are its symptoms?

Horner’s syndrome is an interruption of a cervical sympathetic trunk (or fibers of the thoracic sympathetic trunk that ascend into the cervical trunk), with potential symptoms of unilateral:

• • Miosis (constricted pupil),

  • Ptosis ('droopy' eyelid),

  • Pseudo-enophthalmos (appearance of sunken globe of eye), and

  • Anhydrosis (lack of sweating).