PITX2 and Axenfeld-Rieger syndrome: Here we used whole-genome sequencing to identify two families with non-coding structural variants associated with a typical presentation of PITX2-associated ARS: one family with a 450 kb deletion removing a series of conserved enhancer elements distal to PITX2, and the second family with a 12.54 Mb inversion displacing the PITX2 gene from these same enhancer elements.