Microsporidial Stromal Keratitis Masquerading as Acute Graft Rejection

Abstract

To describe the clinical features, disease course, management, and visual outcome of stromal microsporidial keratitis involving the corneal graft in an immunocompetent patient.Case report.We report the case of a 21-year-old immunocompetent woman, who underwent penetrating keratoplasty for advanced keratoconus in her right eye and presented with features of acute graft rejection after 15 months. Standard treatment using topical and systemic steroids failed to reverse the graft rejection. A regraft was performed in that eye. Histopathology of the donor corneal button revealed microsporidiosis involving the deep stroma.Microsporidiosis is rarely encountered in a corneal graft and masquerades as acute graft rejection. Histopathology could help in making a final diagnosis.