Blau Syndrome, also known as arthrocutaneouveal granulomatosis, is related to uveitis and sarcoidosis 1. An important gene associated with Blau Syndrome is NOD2 (Nucleotide Binding Oligomerization Domain Containing 2), and among its related pathways/superpathways are Infectious disease and Innate Immune System. Affiliated tissues include skin and eye, and related phenotypes are arthralgia and joint swelling