Dahlberg-Borer-Newcomer syndrome (MONDO_0009533) is a very rare ectodermal dysplasia syndrome, described in 2 adult brothers, characterized by the association of hypoparathyroidism, nephropathy, congenital lymphedema, mitral valve prolapse and brachytelephalangy. Additional features include mild facial dysmorphism, hyperthricoses, and nail abnormalities. Also known as: Dahlberg syndrome, lymphedema-hypoparathyroidism syndrome.