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Muscle damage after endoscopic sinus surgery can produce strabismus
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Extraocular muscle damage as a result of endoscopic sinus surgery can cause therapeutically challenging strabismus, according to a retrospective study.
Neepa M. Thacker and colleagues reviewed the charts of 14 patients with strabismus after endoscopic sinus surgery to characterize the types of extraocular muscle injury and the number of muscles involved.
Not only the medial rectus muscle, but also the inferior rectus and superior oblique muscles were damaged in patients in the series, the authors reported. In one patient, multiple muscles were damaged. Muscle injuries included hematoma, muscle entrapment, muscle transsection, and partial or complete muscle destruction with entrapment in scar tissue.
The study is published in the July/August issue of the American Journal of Rhinology.