Three cases of idiopathic "multiple-parallel-line" endotheliitis.

Purpose: To report 3 cases of idiopathic endotheliitis that appeared clinically as multiple parallel lines of keratic precipitates on the corneal endothelium.

Methods: Interventional case reports.

Results: Slit-lamp examinations of the 3 patients showed several parallel dotted lines of keratic precipitates on the corneal endothelium. Although all cases were managed successfully by topical steroid in 1 week, corneal endothelial cell damage occurred. No virus (herpes simplex virus 1, varicella zoster virus, or cytomegalovirus) could be detected by reverse transcriptase polymerase chain reaction in the aqueous humor of 1 of the 3 patients.

Conclusions: This series of cases presented a unique type of idiopathic endotheliitis with the clinical appearance of multiple and parallel lines of keratic precipitates. The expression patterns of the keratic precipitates were distinct from those of previously reported linear endotheliitis.