Case report of conjunctival sac fistula after cosmetic later
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Lateral canthoplasty is a surgical method to beautify eyes by lengthening and enlarging the lateral angle of eyes. It is widely accepted in recent years. However, there are different opinions among people. Some persons regard it as a routine surgery without further consideration while others are neutral due to the related complications [1]. Postoperative complications of lateral canthoplasty include scar, poor alignment of the outer canthus and conjunctival exposure, etc.

A young women who underwent bilateral canthoplasty appeared with lacrimation of the right eye. Author found there was a skin fistula with transparent tears at 2 mm lateral to the right canthus ligament and the liquid containing fluorescein was seen to overflow at the fistula after using fluorescein sodium eye drops. The number 7 lacrimal duct probe was visible under the temporal conjunctiva when exploring the fistula, and the fistula was about 4 mm. The patient was diagnosed with conjunctival sac fistula and fistula excision was performed. The patient did not tear abnormally after observation 3 months later and the incision healed well.

Conclusions
The case report illustrates an uncommon post-lateral canthoplasty complication. Author suggested that surgeons who perform this kind of surgery should ask about epiphora and look for conjunctival sac fistula at follow-up assessment.
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