Ivone Leong Added comment: Comment on list classification: Demoted from Amber to Red. RNASEH2C is associated with Aicardi-Goutieres syndrome 3 on OMIM and Gene2Phenotype. There are 2 unrelated cases from the same geographical region on OMIM about RNASEH2C causing Aicardi-Goutieres syndrome; however, RNASEH2C does not appear to be associated with a metabolic phenotype. Therefore this gene has been demoted to red.