Triple-Symptom Complex: Rare chronic inflammatory disease involving the small blood vessels. It is of unknown etiology and characterized by mucocutaneous ulceration in the mouth and genital region and uveitis with hypopyon. The neuro-ocular form may cause blindness and death. Synovitis, thrombophlebitis, gastrointestinal ulcerations, retinal vasculitis, and optic atrophy may be occur as well.