MONDO_0007662 (anterior segment dysgenesis 4) can be described as follows. Any iridogoniodysgenesis in which the cause of the disease is a mutation in the PITX2 gene. Also known as: IRID2, PITX2 iridogoniodysgenesis, iridogoniodysgenesis caused by mutation in PITX2, iridogoniodysgenesis, type 2.