Retrocorneal membrane after penetrating keratoplasty

Retrocorneal membranes after penetrating keratoplasty (PKP) is a well known complications, resulting from unintentional retention of the host Descemet 's membrane (DM), or donor DM detachment. We describe for the first time th e formation of a retrocorneal inflammatory membrane that mimics donor DM de tachment or retained recipient DM, and discuss the differential diagnosis o f a retrocorneal membrane after PKP! Two patients who underwent PKP and sub sequently developed a retrocorneal membrane are described. In both patients ' eyes a retrocorneal membrane was observed immediately following penetrati ng keratoplasty. While the first patient's membrane persisted for 33 months in the presence of a clear graft, the second patient's membrane disintegra ted and dissolved within two weeks following treatment with topical steroid s. The first case describes a patient with retained Descemet's membrane, wh ile in the second case, it turned out that the retrocorneal membrane was ac tually an inflammatory membrane.