Dyschromatosis Universalis Hereditaria 1, also known as duh1, is related to dyschromatosis universalis hereditaria 2 and dyschromatosis universalis hereditaria 3. An important gene associated with Dyschromatosis Universalis Hereditaria 1 is SASH1 (SAM And SH3 Domain Containing 1). Affiliated tissues include skin.