Horner's Syndrome Triad — FRCA Primary MCQ

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EasyAnatomyHorner's Syndrome TriadFRCA Primary

The stellate ganglion block can cause Horner's syndrome. The classic triad of Horner's syndrome is:

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Correct answer: D — Miosis and ptosis and anhidrosis

Horner's syndrome results from disruption of the ipsilateral sympathetic chain. The classic triad: miosis (loss of dilator pupillae sympathetic supply) / ptosis (loss of Müller's muscle sympathetic supply) / and anhidrosis (loss of facial sweat gland sympathetic supply). Enophthalmos (apparent not real) may also occur.

Reference: RCoA 2021 Primary FRCA Curriculum