Epithelial downgrowth as a complication of toxic anterior segment syndrome.

We present a case of epithelial downgrowth that arose within 1 month of routine clear corneal phacoemulsification. The case was complicated by unexplained total corneal edema from the first postoperative day. Histological analysis following penetrating keratoplasty showed complete endothelial cell loss and an epithelial cyst on the internal surface of Descemet's membrane.