Macular Dystrophy, Vitelliform, 4, also known as vitelliform macular dystrophy 4, is related to macular dystrophy, vitelliform, 1 and macular dystrophy, vitelliform, 5. An important gene associated with Macular Dystrophy, Vitelliform, 4 is IMPG1 (Interphotoreceptor Matrix Proteoglycan 1). Affiliated tissues include retina and eye, and related phenotypes are vitelliform-like macular lesions and decreased arden ratio of electrooculogram