Diseases similar to renal coloboma syndrome include Duane-radial ray syndrome (abnormal gene: sal-like (Sall) 4), Alagille syndrome (abnormal genes: Jagged 1, NOTCH1), Axenfeld-Rieger syndrome (abnormal gene: Forkhead Box C1), and CHARGE syndrome (abnormal genes: Chromodomain Helicase DNA Binding Protein 7 [CHD7], Semaphorin-3E [SEMA3E]). Here, CHD7 is linked to Axenfeld-Rieger syndrome.