Iatrogenic Horner’s Syndrome Associated with Branchial Cleft Cyst Surgery.

Aim: To report a case of right-sided iatrogenic Horner's syndrome developed after branchial cleft cyst surgery. Presentation of the Scope: An 8 year-old boy presented with right-sided eyelid ptosis and enophthalmos, and diagnosed as having Horner’s syndrome. Discussion: Ophthalmic examination yielded miosis in the affected eye. Medical history revealed branchial cleft cyst surgery 4 years ago and mild ptosis was identified in the first postoperative day. Conclusion: Iatrogenic Horner syndrome may follow the cleft cyst surgery in on neck.