Abstract
The effect of botulinum toxin A is investigated in the treatment of adherence syndrome related to strabismus surgery. An 18-year-old boy with decompensated right congenital fourth nerve palsy underwent ipsilateral superior rectus muscle recession and inferior oblique muscle disinsertion. During the early postoperative period, a right hypotropia with limitation of elevation developed and the result of the forced duction test was positive for passive elevation of the right eye. Botulinum toxin A was injected into the right inferior rectus muscle on the 15th postoperative day and orthophoria was achieved 1 week later. A repeat injection of botulinum toxin A was performed 6 months later. On follow-up 2 1/2 years later, his eyes remained orthophoric with limitation of elevation in the right eye and the patient was satisfied with the result. This case demonstrated that adherence syndrome can be treated successfully by botulinum toxin A injection if it is administered during the acute phase, before the development of fibrous scar tissue.
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