Amelogenesis Imperfecta Hypoplastic Type, Ig, also known as amelogenesis imperfecta nephrocalcinosis, is related to amelogenesis imperfecta and amelogenesis imperfecta, type ig, and has symptoms including polyuria An important gene associated with Amelogenesis Imperfecta Hypoplastic Type, Ig is FAM20A (FAM20A Golgi Associated Secretory Pathway Pseudokinase). Related phenotypes are limbs/digits/tail and craniofacial