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Background  Generally, the loss rate of human endothelial cells (HCEC) in routine cataract surgery is 8.5%. When the corneal endothelial cells density (ECD) drops, the HCEC may decompensate to keep cornea dehydration which leads to corneal edema. Granulomatosis with polyangiitis (GPA) is an uncommon autoimmune disease involving multiple organs including eyes such as conjunctivitis, scleritis, uveitis, and corneal ulcer. In this study, we report two cases of GPA whose corneal ECD decreased significantly after phacoemulsification cataract surgery.    Case presentation  In the first case of 69-year-old male with GPA, the ECD dropped 39.6% (OD) four months after phacoemulsification and 38.1% (OS) six months postoperatively respectively. At the final follow-up, the residual ECD was only 55% in the right eye in the 49 th  month, and 56% remained in the left eye in the 39 th  month. In the second case of 54-year old female, left ECD dropped 63.9% at the 4 th  month after surgery and 69.6% ECD remained at the 15 th  month postoperatively while similar ECD of right eye before and after left eye surgery.    Conclusion  Extensive preoperative ophthalmic evaluation and meticulous postoperative inflammation control should be applied to prevent severe loss of HCEC in GPA patients.

Accelerated corneal endothelial cell loss in two patients with granulomatosis with polyangiitis following phacoemulsification