Bilateral Mooren's ulcer in six patients: diagnosis, surgery and histopathology.

We describe 6 bilateral cases of progressive Mooren's ulcer treated by performing conjunctival excision (regional or 360 degrees peritomy). The histopathological study of the conjunctiva adjacent to the lesion showed an hyperaemic and edematous stroma infiltrated mainly by plasma cells and lymphocytes without signs of vasculitis. The peripheral portion of the ulcer was characterized by necrobiotic and hemorrhagic elements along with an absence of the overlying epithelium and Bowman's membrane.