Traumatic superior oblique tendon rupture with ptosis: A case report

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Abstract
The traumatic rupture of the superior oblique tendon with ptosis is extremely rare, and the surgical treatment is very challenging. We reported a case of a 41-year-old man with superior oblique tendon rupture and ptosis due to an iron hook injury. The ocular movement disorders were not obvious except for mild superior oblique underaction but were accompanied by severe extorsion. The distal stump of the superior oblique tendon was shortened and anchored to the periosteum of the supra-nasal orbital margin near the trochlea. Post-operative follow-up revealed the surgical outcome was better than expected, which resulted in significant improvement in binocularity and cosmetic outcomes without complication in the present case. The exploration of the levator palpebral superioris (LPS) in the early post-traumatic stage might not be necessary in circumstances without eyelid laceration. Shortening and anchoring of the ruptured superior tendon could restore almost normal binocularity, decrease the extorsion, and avoid acquired Brown syndrome.

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