Any vitelliform macular dystrophy in which the cause of the disease is a mutation in the IMPG1 gene. The disease is Monarch Disease Ontology id MONDO_0014508 (vitelliform macular dystrophy 4). Also known as: IMPG1 vitelliform macular dystrophy, macular dystrophy, vitelliform, 4, macular dystrophy, vitelliform, type 4, vitelliform macular dystrophy caused by mutation in IMPG1.