Ankyloblepharon filiforme adnatum in trisomy 18.

Ankyloblepharon filiforme adnatum (AFA) is a mild form of ankyloblepharon, in which there is partial thickness fusion of the central portion of the lid margins, sparing the canthi. Although it can be seen as an isolated sporadic congenital defect, it is important for pediatric ophthalmologists to be cognizant of its possible association with a number of anomalies. One infrequent, but nevertheless important association, is with trisomy 18. We present three cases of AFA in association with trisomy 18, and emphasize the need for clinicians to search for other abnormalities in a newborn presenting with AFA.