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PURPOSE To report cases of necrotizing scleritis, a sight-threatening complication that can result from cosmetic conjunctivectomy procedures. DESIGN Retrospective case series. METHODS The medical records of consecutive patients who underwent eye-whitening conjunctivectomy with mitoycin C (MMC) treatment performed by 1 surgeon in South Korea and were referred to the authors' clinic between January 2011 and December 2015 were reviewed. The patients in whom findings of necrotizing scleritis with active inflammation were detected in an avascular area of previous conjunctivectomy were included. RESULTS Of a total of 231 patients who had received cosmetic eye whitening, 4 patients who met the inclusion criteria were identified. The average length of time from cosmetic eye surgery to a diagnosis of necrotizing scleritis was 51 months and all patients had unilateral findings of necrotizing scleritis. There was no underlying systemic autoimmunity or infectious etiology in all cases. Three of these 4 patients were treated with a conjunctival flap; however, all 4 received systemic anti-inflammatory treatment with oral corticosteroids. The mean follow-up duration of the patients was 22.75 months. CONCLUSIONS Necrotizing scleritis is a severe complication that can arise after cosmetic eye-whitening conjunctivectomy with MMC. Because of the large area of the ocular surface that is treated in eye-whitening with MMC, the necrotizing scleritis that can ensue may be more extensive and severe than the surgically induced necrotizing scleritis following other periocular surgeries such as pterygium removal. Proper anti-inflammatory treatment and surgical intervention should be required for management of this complication.