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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Injury to cervical sympathetic trunk produces Horner's syndrome, that includes all, except
assistant
The correct answer is  Injury to cervical Symphathetic trunk (which are formed by T1 to T4 fibres of spinal cord) produces Horner's syndrome. It is characterized by
• ptosis (dropping of the upper eyelid)
• miosis (constriction of pupil)
• anhydrosis (loss of sweating)
• enophthalmos (retraction of eye ball)